"How Many Additions to 8, 7, 6" PPT teaching courseware for carry addition within 20

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"How Many Additions to 8, 7, 6" PPT teaching courseware for carry addition within 20

Part One: Introduction to the topic

Ask the children to carefully observe the runner in the picture on the right. What numerical information did you discover? What mathematical questions can be asked?

876 plus a few PPT, the second part of the content: new teaching knowledge

(1) Perception algorithm.

How to solve this problem in the picture? Ask the children to think independently first and come up with their own ideas, and then share your ideas with the students in the group.

(2) Hands-on operation and understanding of the "ten methods".

What if 8+5 can use the "ten method"? Invite the students to swing the sticks in the group.

(3) Create situations and perform column calculations.

Ask the students to look at the situation diagram. Who can list two addition formulas?

(4) Perceptual additive commutative law.

When the positions of two addends are swapped during addition, the sum remains unchanged. This is called the commutative law of addition.

876 plus a few PPT, the third part: knowledge sorting

Knowledge point 1: Use the "make up ten method" to calculate the addition of 8, 7, and 6.

Just like the addition of 9, the addition of 8, 7, and 6 requires decomposing the other addend in the formula into the addition of 2, 3, and 4, and then adding the number to ten, and finally adding the other decomposed part. Above is the final calculation result.

small exercise

1. Fill in the appropriate number.

6 + 5 = 7 + 5 =

2. Calculate the following questions.

7+4= 6+5= 7+6= 8+7= 7+7= 9+3=

7+8= 7+9= 6+9= 6+8= 6+7= 8+9=

Knowledge point 2: Commutative law of addition.

In addition, the positions of the addends are exchanged, and the final calculation result remains unchanged.

[Example] List two different addition formulas based on the picture below, fill in the calculation process, and share with classmates the rules reflected in the two formulas.

small exercise

1. Write the equation that yields equal numbers.

9+6=( ) 8+2=( )

3+9=( ) 3+4=( )

7+5=( ) 8+0=( )

0+7=( ) 4+8=( )

6+7=( ) 3+8=( )

2. Look at the two addition formulas listed in the picture and use the "make ten method" to calculate.

876 plus a few PPT, Part 4: Classroom exercises

1. Fill in the blanks according to the idea of ​​"make up ten" method.

7＋5＝7＋ ＋ 9＋9＝ ＋ ＋

6+8＝ ＋ ＋ 8＋5＝8＋ ＋

2. Fill in ">", "<" or "=".

9+3 14 8+7 15 6+6 11

8 8+4 9+9 17 9+5 14

3. Fill in the blanks.

(1) The number that is 2 greater than 9 is ( ), and the number that is 4 greater than 7 is ( ).

(2) The number composed of 1 tens and 3 ones is ( ).

(3) 17 is composed of ( ) tens and ( ) ones.

4. Draw horizontal lines under equations that yield the same number.

(1) 15 7+8 6+4 10+5 17-2

(2) 11 6+6 8+3 5+5 7+4

(3) 13 15-1 8+4 16-3 7+6

(4) 12 17-5 7+5 10+3 8+4

876 plus a few PPT, part five: homework after class

1. I can fill it out quickly.

8+4= 8+7= 8+5=

7+6= 7+4= 6+5=

2. I can do it right.

876 plus a few PPT, part six: knowledge expansion

1. Solve problems and experience life.

I picked 7 peaches.

I picked 9 peaches.

How many peaches did you pick in total?

2. Solve the problem.

I caught 8 worms.

I caught 6 worms.

How many insects were caught in total?

Keywords: Free download of first-grade mathematics PPT courseware from the People's Education Press, PPT download of carry addition within 20, PPT download of the addition of 876, .PPT format;

For more information about the PPT courseware "How many numbers are added to 876 with carry within 20", please click on the PPT tag of How many are added to 876 with carry within 20?

"How Many Additions to 8, 7, 6" PPT download of carry addition within 20:

"How Many Additions to 8, 7, and 6" PPT download of carry addition within 20 Part One: Exciting introduction Let's make up 10, I say 3, (student: I say 7) Let's make up 10, I say 8, (student: I Say?) Let’s make 10 and I say 9. (Student: I say?) Let’s make 10 and I say 7..

"What is the addition of 8, 7, 6" PPT on carry addition within 20:

"What is the addition of 8, 7, 6" PPT on carry addition within 20 Part 1: Scenario introduction How do you think you can tell the number quickly? 8+5= Think: 8 plus ( ) gets 10. Think: 8 plus ( ) gets 10. Learning new knowledge can make 8 into 10. You can make 9 into 10. ....

"How Many Additions to 8, 7, and 6" Carry Addition Within 20 PPT Courseware 4:

"How Many Additions to 8, 7, and 6" PPT courseware for carry addition within 20 4 Calculate orally every day 10-8= 9-5= 10+3= 9+7= 10-7= 7+3= 5+5= 9+8 = 6+4= Count in a circle. 8+5=13 7+6=13 7+5=12 8+6=14 8+( )=12 9+( )=15 7+( )=..

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Update Time: 2024-09-21

This template belongs to Mathematics courseware People's Education Press First Grade Mathematics Volume 1 industry PPT template

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