1( )3( )( )6( )( )9 10( )

( ) 13( )( ) 16 17 ( )( ) 20

2. Fill in "+","-"or "=" in ().

1( ) 1=2 3( )3 =6 3 ( ) 1=2

6( )3=3 5( )5= 10 7( )2=9

Third, look at the graphic calculation.

1、△△△ △△ ○○○○○○ ○○

2、☆☆☆☆☆☆ ☆☆☆

4. Fill in ""or "=" in ○.

3○2 5○6 3○3 6○9

5. calculation.

5+5= 3- 1= 7+ 3= 10- 10 =

1+4= 6-3= 0+6= 1+8 =

2+7= 0+5= 8 -3= 2 + 7 =

I. Write from 20 to 1

Second, the calculation

3+5= 4+5= 8+3= 6+5=

3+7= 6+4= 7-3= 8-2=

8-7= 3-2=

Third, look at the number of colors.

△△△△ □□□□□ ⊙⊙⊙⊙⊙⊙

3 4 5

◇◇◇◇◇◇◇ ☆☆☆☆☆☆☆☆

6 8

Fourth, fill in the numbers.

9 7 8 9

∧ ∧ ∧ ∧

1 □ 2 □ □ 3 □ 4

□ □ 7 4

∧ ∧ ∧ ∧

3 4 3 6 □ □ □ □

5. Number words 7 9 1 4 632 5 1 8 in descending order.

6. Do the questions according to the following example.

For example: ○+○ = ○.

2+3=5

△△△△-△△= △△

○○+○○=

△△△△△-△△△=

○○○+○=

△△△△△△-△△=

○○+○○○○=

△△△△-△△△=

Seven, write the formula according to the application problem.

1, Xiaohong has 4 flowers, Xiaoming has 3 flowers, Xiaohua has 2 flowers, and how many flowers do three people have?

Xiaoming bought five pencils and used three. How many pencils does Xiaoming have?

There are four people in Xiaohua's family, two more in Xiaogang's family than Xiaohua's, and how many in Xiaogang's family?