Lesson in mathematics "Addition and subtraction of decimal fractions. Summary of the lesson "Addition of decimal fractions" Abstract Addition and subtraction of decimal fractions

The following picture is called "oral account" (slide 7)

1. (Slide 8) Put the numbers instead of stars so that faithful inequalities:

2. (Slide 9) What kind of cat worshiped the ancient Indians?

In the picture (slide 10) we see the biggest cat. Jaguar caused admiration and respect of the American Indians. Aztecs, Olmeki, Inki and Maya worshiped Jaguar, seeing in it the embodiment of divine power and energy. The skins of the jaguarov wore the leaders tribes, claws and teeth of this predator served as talismans; It was believed that Yaguar's blood drank the power and dexterity of this beast.

3. (Slide 11) What bird called a legend bird?

Venedous crane-12,

sacred IBIS-11,

white and black storks-10

(Slide 12) A lot of legends are complex people about the austa, and in all he is a symbol of kindness and happiness. ... One of the legends tells the story, which explains why the storks are black wings. On the straw roof of the house, in which the father lived the mother and two babies was a stork nest. One day there was a fire, and the house caught fire, the red flames slid themselves on the walls on the roof. Storks worried, began to shout and call the owners of the house, but they left far from home and did not hear the scream of storks. Birds without afraid of the flame, rushed into a flaming house and carried two babies from the fire. It is since that time the tips of the wings have black storks, and the legs and the beak are red from burns.

4. We continue the excursion. What is shown in this picture? (Slide 13)

Royal Mantle-part of the solemn vestments of the monarch.

(Slide 14) From the skins of which animal sewed the royal mantle?

Guys, you see the paintings (slide 15), which must be prepared for the exhibition, but the organizers have enough money to restoration of one picture. Let's find out which picture plans to prepare a guide to your supernisage. To do this, you need to task.

Doctors advise to eat as much vitamins as possible, especially vitamin C, which is contained in berries and fruits. Install where vitamin C is more. (Slide 16)

	Oranges - 0.055 g
	Mandarins - 0.04 g
	Cranberry - 0.015 g

Subject: Mathematics

Topic: Addition of decimal fractions.

Purpose: Secure skills, acquire skills in solving examples and tasks

decimal fractions

develop mathematical thinking, logical thinking, computational

skills, formation of scientific worldview

Type: Lesson - Competition

Epigraph: "The man is like a fraction: in the denominator - what he thinks about himself,

in the numerator - what he really is. The greater the denominator

the smaller the fraction. " Lev Tolstoy.

During the classes

1. Org. moment. Psychological warm-up "Let's create a good mood."

Turning to the neighbor, look at him, with a smile in the eyes and tell me

together: "Hello, neighbor! "

2. Warming up. Decision entertaining tasks.

1) Duck flew: one in front, two behind; One behind and two ahead; One of each

two and three in a row. How much ducks? (3)

2) There were 10 people at the meeting, and they all exchanged handshakes.

How many handshakes were? (90)

3) The seife code consists of three different numbers: 1.3 and 5. How many different

code combinations can be made up? (135, 153, 315, 351, 513, 531).

3. Theorists

1) What record is called a decimal fraction?

2) What kind of ordinary fraction can be represented as decimal?

3) Where is the comma when writing a decimal fraction?

4) Whether the decimal fraction will change if at the end of the decimal fraction attributes or

drop zeros?

5) What ways can we compare decimal fractions?

5) Formulate the rule of addition decimal fractions?

4. Oral work

1) Read the fractions: 16,023; 98.704; 17.027; 9.006; 5.00005; 34,3008.

2) write down the decimal fractions: 0.9; 0.17; 0.03; 2,315; 3,054 9,207.

3) Find a mistake: 3.7 + 0.02 \u003d 3.9 5.04 + 1.1 \u003d 5.14 1.2 + 0.3 \u003d 1.23

5. Guess the word.

Card number 1. In Russian, this word appeared in VIIIV., It comes from the verb

"Frame" - break, break into parts.

Card number 2. This unit of length introduced merchants. She was also called "elbow".

Card number 3 on the globe live birds - error-free "compilers" of the forecast

weather for the summer. The name of these birds is encrypted in a card number 3.

The key to the answers:

6. Cross - Poll

1 team

1. Number standing over a fractional feature?

2. The result of subtraction?

4. Number that is not easy to compose?

5. Tool for building a circle?

6. Multiplier speed for a while?

7. The result of division?

8. Natural number having more than two divisors?

9. Distance made for a while?

10. The result of division?

2 team

1. Tool for measuring and building segments?

2. The result of multiplication?

3. Natural number having only two divisors?

4. Number worth under a fractional feature?

5. Tool for building and measuring angles?

6. The result of addition?

7. The number that is the solution of the equation?

8. Distance divided by speed?

9. A sign separating the whole part of the decimal fraction from fractional?

10. Fraction that has a numerator more denominator?

7. Reflection

Summarizing.

Estimation.

8. Homework

P. 256 - Advanced task.

\ For teacher mathematics, algebra, geometry

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The abstract of the lesson sent:mathematics teacher of the Higher Category, Popovich Olga Vasilyevna Sosh No. 5 G.Severodonetsk Lugansk Region Email: [Email Protected]

Lesson for grade 5

Theme lesson: Addition and subtraction of decimal fractions. (Journey to Mathematics Stations)

Objectives:

Educational: acquaint students with the challenges to movement and against the current; form the ability to solve such tasks using the addition and subtraction of decimal fractions; Work out the skills of completing and subtracting decimal fractions.
Developing: Development of cognitive interest, logical thinking. Develop the skills of collective work in combination with independent, interest in mathematics, logic and smelting, communicative and labor competence, expand the horizon.
Educational: education of hard work, accuracy, development of communicative culture. Increase liability not only for your own knowledge, but also for the successes of the whole team. Rail in student curiousness.

The course of the lesson:

Check your homework. Consultants talk about the results of checking homework.

The class is divided into three teams: three rows. Competitions take place between three teams, but everyone can win. When calculating points, the speed is not taken into account, only the correct task is taken into account. Thus, by the end of the competition, it may be that the number of points for everyone is the same. This will help keep the friendly atmosphere in the classroom. But for this you need to remind students that they are competing not with each other, but with their knowledge.

Each station opens its own guide list, reads the name of the station, motto. The teacher tells how students will meet with this station during the school year at extracurricular activities. The conditions of the competition are told. The tasks are designed for 7 shelters in a row, they are checked immediately in the lesson. You can check the tasks performed when the next contest passes, and you can select consultants before the lesson. Points are calculated regularly and discharged on the board.

We begin the lesson by poem:

Verbal counting! We will create this business

Only the strength of mind and soul!

Numbers converge somewhere in darkness

And the eyes begin to glow!

And the circle only clever faces!

Verbal counting! We believe in the mind!

1 station. Verbal counting

Motto:

That of you me all naughty,

Who considers all faster.

Outfoot in the ranks.

A list is distributed to the record of responses with a chain (the relay from the first parties begins), the previous answer is involved in the following action.

The action dictates a teacher (you can prepare a record on a tape recorder). An example in the relay sheet is not recorded, only the answer is recorded. For the solution of the example is given 10 seconds.

The task:

Answers:

For each correct answer - 1 point.

2 station. Geometric figures

Individual work.

The pattern with squares is hanging on the board (or draws on the board):

The work is individual and each of the students records the answer on the card, sociable for recording answers (you can distribute the same squares, but in a smaller size, and each will record your response to a separate cell).

About 1 minute is given to the task (during this time, all students should write their number).

The task:

3 station. Savvy

Motto:

If the smell is applied,

The task can be solved faster.

Work in pairs.

Each pair is a sheet to record responses, the decision can be discussed in a pair (you can conduct a competition in the form of an individual solution). Tasks The teacher reads out loud, for the solution of the problem is given 15 seconds, students write answers.

Tasks:

Troika horses ran 30 km, how many kilometers running each of the horses?
Freed by a pack of geese: one goose ahead and two behind; One behind and two ahead; One goose between two and three in a row. How many were just geese?
On two hands 10 fingers, how many fingers on 10 hands?
At seven brothers on one sister. How many children?
What is lighter than kilograms of wool or kilogram of iron?

Answers:

For each correct answer - 2 points.

Fizkultminutka.

Historical reference

Mathematics of ancient Egypt instead of the usual signs "+" and "-" used signs (legs go)

For the first time the doctrine of decimal fractions in the XV century, Samarkand Mathematics and Astronomer Jamshid Ibn Masood Al-Kashi. In 1585, Flemish scientist Simon Stevein issued a small book called the "tenth", in which the rules of action with decimal fractions outlined.

In 1592, they began to separate the whole and fractional part of the comma.

In the United States, instead of the comma use a point. In connection with the rapid development of programming, the point is used more and more

4 station. Gymnastics Um

Motto:

Friendship with fractions prove

Addition and subtraction show.

1. To issue a chain of expressions

2. Hold equations

3. Perform the action by choosing the most rational procedure

1). 3,3+(0,7+5,2); (9,2) 2). 3,3+5,9+0,1 (9,3);3). 3,3-(0,1+0,3) (2,9);

4. Calculate in meters

one). 5,2m-3cm;

2). 5,2m-3DM;

3). 5,2km-3m;

(1m \u003d 100cm; 5,2m-0.03 \u003d 4.77;)

(1 dm \u003d 10 cm; 5,2m-0.3 \u003d 4.9m;)

(1km \u003d 1000m; 5,2-0.003 \u003d 5 197;)

According to the calculations of modern cybernetics and mathematics, von Neumanana, it turned out that the brain can accommodate about 1020 units of information. This means - each of us can remember all the information contained in millions of volumes of the world's largest library.

Working with a textbook. Watch the textbook cover, where we consider the tables of large numbers.

5 station. Traffic

Motto:

Everyone and old and young

Main characteristics of movement:

Distance-S.

Speed-V.

Formula S \u003d V T

Movement on the river

Own speed V - speed in the standing water of the lake

Flow rate V t

The speed by the flow V is true. VP. \u003d V + VT.

The speed against the flow of the opposite T.V. \u003d V-VT.

V T \u003d (VPO + in contrary): 2

Own boat speed	River flow rate	Boat speed for flow	Boat speed against current

Solving exercises: №841.843,858 (2), 860 (3), 865 (1).

Fizkultminutka for eyes.

6 station. Test

Motto:

Test tasks you decide

Your ability you prove

Inter-check.

Option 1

1. Which of the mixed expressions are set (yd) Amount:

2M 28kg, 1g 5 kg, 5G 4Y.

1) 8.568g; 2) 8.73g, 3) 8.433g; 4) 8,326

2. Invite the equation, the root of which is the number 10.

1) x-2,093 \u003d 0.207; 2) 2,093-x \u003d 0.207; 3) 12.903-x \u003d 2,093; 4) x + 2,093 \u003d 12.93.

3. What is the difference from the above numbers 10-0.090908?

1)9,010101; 2)9,909092; 3)9,090902; 4)0,919192.

4. What is from these numbers equal to the amount of the roots equation x-1,048 \u003d 0.9094 1.005-x \u003d 0.044

1)2,92; 2)1,19; 3)1,2; 4)2,91.

5. What from the pairs of numbers is the value, the self-speed of the boat and the velocity against the flow, if the rate of the river flow is 2.3 km / h, and the flow rate is 18.1 km / h.

1) 16.2 and 13.9; 2) 15.8 and 13.5; 3) 20.44 and 18.1; 4) 20.44 and 22.7.

Option 2.

1. How exactly expressed expressions in terms of expression in terms of the amount: 7m 5 dm, 3m 7cm and 2m 88mm.

1) 12.955m; 2) 12,658m; 3) 12.838m; 4) 14.08m.

2. What of the above equations is the number of 2.005.

1) x + 1,195 \u003d 3.22; 2) 3,2-x \u003d 0.195; 3) 2.005-x \u003d 0; 4) 1.005 + x \u003d 2.005.

3. What data is equal to the difference 4-2.996?

1)2,9994; 2)2,0004; 3)1,9994; 4)1,0004.

4. What is the sum of the roots of equations from the above numbers.

x + 5.4 \u003d 10.31 and x - 3,8 \u003d 8.9 with an accuracy of units.

1)17; 2)18; 3)17,6; 4)16.

5.Kakoya from the above pairs of numbers is the recording of the values \u200b\u200bof own speed and speed on the flow of 2.6 km / h, and the speed against the flow is 17.2 km / h.

1) 14.6 and 12; 2) 19.8 and 22.4; 3) 19.8 and 14.6; 4) 19.8 and 17.2.

Test response codes

Summarizing

Then the scores count and the winner is determined. At the conclusion of the lesson, award every team: for the victory (winners of the competition), for the quick expense and solving problems (rapid accounts), for the compilation of Tangram and beautifully compiled drawing (artists). Remind that each of the stations will still meet during the school year.

Finishes the lesson of the reader or teacher:

Homework: 842,859 (1), 854. 865 (3.4) N.30

The eyelid continues.

And the other is approaching the age.

For silly steps

Climbing dangerous tops

Never, never

Will not give a man

His superiority

Clellow cars.

An abstract lesson "Addition and subtraction of decimal fractions. Traveling in mathematics stations"

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Plan-abstract lesson in mathematics in grade 5 on the topic "Addition and subtraction of decimal fractions"

Lesson number 108 (5/5).

Mathematic teacher I. categories: Nikulina Irina Evgenievna.

The purpose of the lesson: Repeat, systematize, consolidate and apply the knowledge and skills of students on this topic.

Tasks lesson:

Educational (formation of cognitive Wood) -

● repeat and consolidate the material studied on the topic "Addition and

subtraction of decimal fractions "in the process of solving various tasks;

to form at the students to be aware of the topic;

check knowledge of students and adjust them;

developing (Formation of regulatory Wood) -

form communicative skills;

develop readiness for self-education;

develop attention, logical thinking, intuition, mathematical speech, smell, the ability to self-check and analyze their mistakes;

educational (Formation of communicative and personal Wood) -

educate discipline, high performance and organization;

to bring up the feelings of collectivism, the joy of empathizing the success of comrades.

Type of lesson: Correction lesson and summarizing knowledge.

Equipment: Computer, Projector, Monitor, Screen, Tutorial, Notebook, Pen, Diary, Printed sheets with tasks to a lesson for 15 desks, 15 yellow pancakes made of colored paper for Quest Winner Room: "Who else will eat pancakes?" and estimates for independent work, 30 questionnaires for reflection.

Form of the lesson: Computer presentation.

Motivation of the lesson: Stimulate interest in learning mathematics.

Receptions: - creation in the lesson of the exercise, surprise;

Creating a success situation;

Operational control over the fulfillment of requirements.

Lesson plan:

Organizational moment (1 min).

Actualization of knowledge. Oral work (5 min)

Repetition of reference knowledge (6 min).

Fastening the material. Work in pairs (6 min).

Fizkultminutka (1 min).

Independent work (6 min).

Solving tasks and examples (10 min).

Summing up the lesson. Reflection (3 min).

Setting homework (2 min).

During the classes.

1. Organizational moment. Staging the theme and objectives of the lesson. Record the date and theme lesson in working notebooks. (Slide 1)

Today we have an unusual lesson - a holiday lesson. And what holiday we will celebrate today, you will learn when you put the numbers in descending order. (Slide 2)

According to Ozhegova's dictionary: "Maslenitsa is an ancient Slavic holiday of winter wires, during which pancakes be baked and enlightened." Ancient believed that together with a round, ruddy, hot pancake, so similar to the sun, they eat a piece of its heat and power. (Slide 3)

2. Actualization of knowledge. Oral work.

Monday - meeting.

Monday - On this day

Oil to meet us is not too lazy.

The day is so called "Meeting"

All day in the morning in the evening.

On this day, they meet Carnival, dressing a doll, scarecrow in old women's clothing, they embrace this scarecrow on the pole and with singing they carry on the sleigh on the village. Put the carnival on the snowy mountain and ride from it on the sleigh. Begin the furnace pancakes. (Slide 4)

1) To have fun to meet Maslenitsa, the sun glanced to visit us. (Slide 5)

Drobi recorded: 0.24, 0.2400; 0,240; 2.4 and fraction 24/100. What fraction is superfluous? (24/100)

2) Find equal fractions among fractions: (slide 6)

03 2,300 2,003 2,0300

2,30 2,3 2,030 2,0030

3) Compare numbers: (slide 7)

20,821 … 20,83;

0,27 … 0,278 .

4) Taking advantage of one mathematical sign, get a number greater than 3, but less than 4, from numbers 3; 5; 6; 7: 3 ˂ x ˂ 4. (Slide 8)

Answer: x \u003d 3,567.

3. Repetition of reference knowledge.

Tuesday - Pigs.

We will play on Tuesday.

Play before post.

You will show us, the oil,

Shangoy, pancake, cake.

In the morning, young people were invited to ride from the mountains, eat pancakes. The name of relatives and acquaintances were called: "We are ready and pancakes are ready - we ask you to complain." (Slide 9)

1) - Guys, let's repeat the rules of addition and subtract decimal fractions with an unusual way! We will now tell us the rule in the poetic form your classmate.

To fold the fraction with the fraction of decimal,
Remember the rule is not difficult:
Write down one fraction under the other
The comma in order to decide.
For convenience with fractions
Signs decimal equal zeros.
Now fold the numbers figuratively,
As you did it in the numbers of natural.
And the answer advice will be simple:
Sign up commas.

Similarly, do when subtracting decimal fractions.

2) - Guys, add and subtract decimal fractions in notebooks. Comments the solution of examples one student. (Slides 10,11)

3) - So parsley granted to us to play with us. Perform the task orally. (Slide 12)

Put the comma in the right place:

4. Fastening the material. Work in pairs.

Wednesday - "Landca".

Wednesday Rostica pleases:

Pictulates, will contact!

Maslenitsa chews,

All guests are planted at the table. (Slide 13)

From this day baked pancakes - yellow, round, hot as the sun. Breeds ate a lot. They ate Russian people and fought themselves on themselves: "Damn is not a wedge, the belly does not split." On this day, the son-in-law came "to a black on the pancakes." Besides the son-in-law invited other guests. (Slide 14)

1) - Let's find out which of the 8 participants in the contest "Who is more pancakes will eat?" Winning. To do this, you need to find the values \u200b\u200bof expressions and choose among the answers the greatest result. You work a couple. Having consisted, show me a pancake with the winner number. (Slide 15)

Answer: №6.

5. Fizkultminutka "We have become students."

- And now it's time to relax a little. (Slides 16-18)

We became students.

Observe the mode yourself:

In the morning we, when woke up,

Smiled, stretched.

For health, mood

We do exercise:

Hands up and hands down

On socks rose;

That sat down, they got off.

And then we were wash away,

Gently dress up.

Have breakfast and without hurrying

To school walked

To the knowledge is trying.

6. Independent work.

Thursday - "Wide Maslenitsa". (Slide 19)

Razgulay - Thursday came,
From the morning on the table.
Maslenitsa covered in the pancake
All feed up to lunch.

Thursday is the most fun day. People indulged in all sorts of fun: ice mountains, boals, swing, horseback riding, carnivals, fist fights, climbing on the post. In a word - the height of the guys. From this day, Maslenitsa unfolded in full swing. To this day, people are preparing for a long time for the holiday to be cheerful and memorable.

We, too, several lessons were engaged on the topic "Comparison, addition and subtraction of decimal fractions." Let's check what we learned over these days, do an independent work.

Let's check the performance of independent work. They took a pencil or a green handle. If the answers are correct, put "+", if incorrect, then "-". (Slide 22)

Exposure. (Slide 23) Write your surnames and ratings to pancake. Send pancakes from the rear desk.

7. Solving tasks and examples.

Friday - daffs evening.

Although the china pancakes are delicious yes sweets,

But the teaching is treated for the Maslen Bog.

The hazard was invited to visit their teaching, treated them pancakes.

(Slides 24, 25)

1) Solution of the problem of practical orientation (slide 26)

In order to bake pancakes for the trembling, the son-in-law bought in the store:
* bottle of milk weighing 0.7 kg,
* 1.5 kg of flour,
* 0.75 kg of sugar.
All purchases he folded into a package, designed for 3 kg. Will the package withstand?

1) 0.7 + 1.5 + 0.75 \u003d 2.95 (kg) - the weight of all products,

2) 2.95kg ˂ 3kg, i.e. Withstand the package.

Answer: Yes.

Saturday - Zolivkin gathering.

Wide Maslenitsa

Brides helps

Zolovok collects

Pancakes treats

Gifts gives up.

Zolovka is a sister of her husband.
On this Saturday day, young daughter-in-law took their own. (Slide 28)

Maslenitsa also gave us an unusual task. You need to guess the encrypted word. (Slide 29)

Answer: Pelican. (Slide 30)

8. Summing up the lesson. Reflection.

The last day of the carnival week was called "Forgiven Sunday" or Wires. (Slide 31)

Sunday is carried out

And also forgive everyone!

We will ask for forgiveness

Kisses as followed.
On this day, the straw scarecrow is burned - a symbol of winter.The ashes dispel on the field so that there was a good harvest. Watch the winter until next year. Everyone is asking for a sorry for intentional and random offenses and grief. Bow to legs. And in response he heard familiar words: "God will forgive." It ends the walking, bonfires are breeding on the ice slings to melt the ice to destroy cold. Own carnival, and with her and winter. Sound droplets. Spring comes into their rights. (Slide 32)

So, our acquaintance with the Russian folk holiday "Maslenitsa" came to an end. Let's summarize.

Did you like the Russian national holiday "Maslenitsa" in mathematical processing?

Remember what purpose did we put at the beginning of the lesson?

Repeat, systematize, consolidate and apply your knowledge, skills and skills on the topic: "Addition and subtraction of decimal fractions."

What do you think we coped with this purpose?

Copened.

Let's see how everyone worked in a lesson?

Estimation.

Mood reflection and emotional state. (Slide 33)

Application form for reflection:

Dear student, that's the lesson ended. Please answer you questions, noting the "checkmark" selected answer
1. I worked at the lesson		passively
2. His work in the lesson		not satisfied
3. The lesson seemed to me	short
4. For a lesson I
5. My mood	got better	it became worse
6. The material of the lesson was		do not understand
		useless
	interest

9. Setting the homework.

The one who loves to learn and engage in creativity never stops on the result! They always move forward! And put new goals. For you a new task: Come up with the task with encrypted words by adding and subtracting decimal fractions, but that it was interesting and informative. Task on the landscape sheet. It will be your next project in mathematics. If it is difficult, discuss them together. (Slide 34)

Farewell, Maslenitsa! (Slide 35)

In the Astrakhan Art Gallery named after Kustodiev, you can admire the wonderful paintings of the Masters from Astrakhan dedicated to the Maslenitsa. Before you some of them. (Slides 36-39)

Thank you all for the lesson! (Slide 40)

Bibliography

Chastushki_babok-ezhek.www.leopold-baby.com.

Technological card lesson

		Tasks lesson	used eor used	Teacher's activities	Activity student		Formulated Wood
		Tasks lesson	used eor used	Teacher's activities	Activity student		Cognitive	Regulatory	Communicative	Personal

	Organizational at birth	Create a favorable psychological attitude to work.		Greeting students; Check by a class readiness teacher to a lesson; Organization of attention; Preparation of students to activities in the lesson; Allocation of the goals and objectives of the lesson.	Students listen to the teachers and look as needed on the screen, respond to the questions of the teacher, in notebooks make records.		General educational: 1. Something reading, 1. Entering the concept.	1. Potion, 2. A plan of plan and after-thought activity.	1. Planning the cooperation of the teacher and students, 2. I listen	1.So definition, 2. Installation of communication between the purpose of educational activities and the motive, 3. Ready to life and personal self-determination
	Actualization of knowledge. Oral work. Repetition of reference knowledge	Actualization of reference knowledge and ways of action, the development of logical thinking; Ensuring perception, comprehension, generalization of the material studied, applying new information technology		The teacher, with the help of oral tasks from the slides, organizes the front work with the class. The teacher reads tasks from slides and explains how to perform them.	Students listen to the teacher. Think over the answer, raise hands. He voiced the answer with a complete explanation of one of the students, others listen to the answer of this student. As you need, you adjust the response response.		General educational: 2. Items to structure knowledge, build statements orally, 3. Select the most effective ways to solve training tasks. Universal logic actions: 3. Construction of the logical chain of reasoning	2. Potion, 3. Control, 4. Correction, 5.Vall self-regulation, mobilization of forces and energy, overcoming obstacles	1. The presentation of the issues in the team, 2. I have to listen and join the dialogue,	2. Knowledge of moral norms of the ability to highlight the moral aspect of behavior
	Fastening the material. Work in pairs on a card	Generalization of the material studied, the development of cognitive interest in mathematics, applying new information technologies and organizing work in parachmatic pairs.		The teacher aims students on the group form of work. Explains the execution of tasks from the card on the slide 15.	Students organize work in a pair. Perform tasks in notebooks. Gaying the room, the children raise their hand, call it. See on the screen consistently emerging answers.		General educational: 1.Poisk and output the need for my information, 2. The structure of the struggle of the knowledge, to build you informations in oral and writing form, 4.Close reading, Universal logic actions:	1. Suiting the plan and sequence of activity, 2. Potion,	1. Listen and join the dialogue, 2. Planning cooperation, 3. Item with sufficient completeness to express my thoughts, 4. Amount to participate in collective discussion	1. Ready to life and personal self-determination
	Fizamenta	Healthy Saving		The teacher in the poetic form informs students of the team action team.	Students perform movements, listening to the teams of the teacher.					1. Ready to life and personal self-determination
	Independent work	Check comparison skill, addition and subtract decimal fractions when expressing values.		The teacher organizes independent work.	Students listen to O. jasten the teacher to fulfill the tasks of independent work. Perform tasks in the notebook on their own during the allocated time.		General educational: 1.Poisk and allocating the necessary information, 2. Items to strudust knowledge, build statements in writing, 3. Select the most effective ways to solve training tasks, 4.Close reading, Universal logic actions: 3. Installation of causal relationships	1. Suiting the plan and sequence of activity, 2. Potion, 3.Vall self-regulation, mobilization of forces and energy, overcoming obstacles	1. Listen	1.So definition, 2. Installation of communication between the purpose of educational activities and the motive
The teacher reports students that they will solve the task of practicality and find the values \u200b\u200bof expressions from the slides, guessing an encrypted word. For those who see bad, the texts of tasks are printed on a separate leaflet. The teacher reads the text of the task from the slide, causes one student to the chalkboard for its solution, and the rest asks to decide in the notebook on their own. Those students who find out in the decision, the teacher asks to solve along with the meeting with a student at the board. Assesses students who solved the tasks at the board and independently.	Students solve tasks in notebooks. Alternately 4 students work at the board with complete solution explanation.		General educational: 1.Poisk and allocating the necessary information, 2. Imagine to structure knowledge, build statements in oral and writing, 3. Select the most effective ways to solve training tasks, Universal logic actions: 3. Installation of causal relationships	1. Suiting the plan and sequence of activity, 2. Potion, 3. Correction, 4.Vall self-regulation, mobilization of forces and energy, overcoming obstacles,	1. Listen to 2. Item with sufficient completeness to express your 4. Lining the monologic form of speech	2. Installation communication between the purpose of educational activities and the motive
	Summing up the lesson. Reflection.	Assess the result of its activities and the whole class.		The teacher asks students questions; assesses high-quality work class and individual students; Organizes reflection.	Students respond to teacher's questions, think about their attitude towards a lesson, choose the corresponding answer in the questionnaire.		General educational: 1. Imagine to strudust knowledge, build statements orally, 3.flexia 4. Above adequately compressed to formulate thoughts, Universal logic actions:	1. Potion,	1. Listen to 2. Item with sufficient fullness to express my thoughts, 4. Lining the monologic form of speech, 5. Value to participate in collective discussion	1. Ready to life and personal self-determination 2. Anathematically ethical estimation of the digestible content, based on personal and moral and ethical values
	Setting homework.	Ensuring an understanding of the children's children, content and methods of performing d / s.		The teacher asks students to open diaries and record d / s; Gives recommendations for its implementation.	Students are recorded homework in diaries; Listen to the teacher's comments. Students pass profiles and notebooks on the teacher's table to check independent work when leaving the cabinet.			1. Potion	1. Listen	1. Ready to life and personal self-determination

This is a lesson to systematize and fix the material studied. For a comprehensive verification of educational competencies of students, ICT technology is used. When working out the skills of addition and subtraction of decimal fractions, independent work with self-and mutual test is used. The prevailing method of organizing training activities is interactive: comparison, analysis, observation is accompanied by a computer presentation.

The use of ICT technology allows you to develop logical thinking, mathematical speech, promote rapid actualization and practical application of previously obtained knowledge, skills and methods of action in a non-standard situation.

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Municipal educational institution

main School No. 122

Kirovsky district of Volgograd

Subject: "Addition and subtraction of decimal fractions"

Prepared: Saenko Irina Nikolaevna,

Mathematics teacher MOU OOS number 122

Abstract lesson "Addition and subtraction of decimal fractions."

Class: 5.

Goals and objectives:

Create conditions for the development of students with computing skills, skill

to solve problems.

Tasks: 1. Subject: Promote the development of computing skills when adding and subtracting decimal fractions

Regulatory: to form skills to accept and maintain a learning task;

take into account the guidelines dedicated teacher in educational material;

Communicative: to form the ability to take part in the work of couples and groups, negotiate and come to a general decision;

Personal: Continue the formation of the idea of \u200b\u200bthe reasons for success in studying, the development of the internal position of the student at the level of a positive attitude towards mathematics.

Type of lesson : Lesson - Workshop (development and testing of knowledge on the topic)

Work forms : The tasks are chosen so that the work in the lesson was:

Development of understanding on rumor mathematical speech;

Mutual, independent check of students of their works;

Work with groups of 2 people.

Types of training activities:

Hearing (understanding of rumor scientific speech);

Individual work, work in pairs;

Practical tasks;

Speaking;

Mental analysis;

Self-test;

Motion

DURING THE CLASSES

1. Organizational moment

Hello! Sat yourself!

2. Setting the purpose of the lesson (Slide 2)

The French writer Anatole France once remarked: "You can only learn fun ... To digest knowledge, you need to absorb them with appetite." We follow this advice of the writer, we will try to be attentive, we will "absorb knowledge" with great desire, because they will use you in the future.

(Slide 3) The topic of our lesson is "addition and subtraction of decimal fractions."

Opened a notebook and recorded the number and theme of the lesson.

The doctrine of fractions has always been considered difficult .. The Germans have preserved a proverb: "Get into the fraraty", which means to get into a difficult position. And the task of today's lesson is to prove that the fraraty will not be able to put you in a difficult position. We will confidently fold them and deduct. I will be glad to your good answers.

3. Generalization of the material passed (front survey) (slide 4)

Let's remember:

1. How to fold decimal fractions?

Answer: To fold decimal fractions:

c) perform addition, not paying attention to the comma,

2. How to subtract decimal fractions? (Slide 5)

Answer: To subtract decimal fractions to:

a) levels in these fractions the number of decimal places,
b) write them with each other so that the comma is written down
c) perform subtraction, not paying attention to the comma,
d) put in response a comma duty in these fractions.

4. Oral account (slide 6)

8,7 - 1,8 =

6,3 + 2,4 =

7,2 - 2,9 =

9,1 - 3,6 =

2,5 + 1,8 =

8,3 - 1,2 =

5,6 - 3 =

5 + 2,6 =

Decide equations (slide 7)

a) 2.5 + x \u003d 7

b) 5 - x \u003d 3.4

c) x - 6.8 \u003d 3.4

d) x + 8,7 \u003d 15

5. Working with a textbook (Slide 8)

Complete Task No. 684, No. 692

6. Fizkultminutka (slide 9)

And now, guys, get up,
Hands slowly raise
Squeeze your fingers, then open,
Hands down and so stand.

Head is tired too.
So let's help her!
Right and left, once and two.
Think, think, head.

Left to the right, left
And beyond again for business.

7. Oral work

It is known how important is the comma in Russian. From the wrong arrangement of the commas sense of the proposal can change dramatically. For example, "to execute it is impossible to pardon" and "execute, you can not pardon." In mathematics on the community, loyalty or infidelity of equality depends on the comma.

Task: Put the commas so that the equality is true (slide 10)

32 + 18 = 5

3 + 108 = 408

42 + 17 = 212

736 - 336 = 4

63 - 27 = 603

57 - 4 = 17

8. Independent work with self-test in pairs and self-esteem.

(Slide 11)

Students in a pair exchange work and check the work, using the answers specified on the board (slide 12) and expose estimates to each other

Option 1 Option 2

1. Fill actions 1. Fill action