First, see who is quick to whom. (17)

3+9= 5+9= 4+7= 4+2=

6+9= 12- 10= 8+8= 18-3=

5+7= 2+8= 4+3= 0+ 10=

14-4-3= 4+0+6= 8+9-3=

16- 10+4= 3+9+5=

Two. Fill in the blanks (32 points)

There are () tens and () ones in 1 and 15, which are between () and ().

2. Two tens are (), and 10 contains () ones.

3. One digit of a number is 0, and the decimal digit is 2. This number is (), after ().

4. Fill in the numbers according to the law: () 8( )() 1 1 () ()

15

5、

About () when (:) about () when()

6. Fill in "

9- 3 9 1 1+4 15 14+4 1 1+2

7 6+3 6-6 12 3+9 5+7

7. Write two formulas, the number of which is10 □□□□□□□□ =□□□□□□ □

8. Fill in "+"or "-"in the box.

14 4 = 10 16 4 = 20 8 7 & lt； 9 12 >6 5

9. Fill in the appropriate number in ().

4+( )= 1 1 ( )-( )=5 7+4=( )+( )

5+6=( )+3 =( )+( )

Third, count and circle. (16)

1、☆☆☆☆★☆☆☆☆☆☆☆☆☆☆☆☆☆

(1) A * * has () five-pointed stars.

(2) Paint the eighth ☆ from the left in red.

(3)★ () from the left.

(4) There is a () ☆☆☆☆ on the eighth right.

2. Circle different categories with "Ф".

Apple pear banana radish

Fourth, do as required. (6 points)

1) A * * * has () objects, including ().

2) The number on the left () and the number on the right ().

3) Circle the sixth object from the left and color the third object from the right red.

5. Try your eyesight! (5 points)

1, compare and color the longest pencil red.

2. Count and fill in.

6. Look at the picture and list two addition formulas and two subtraction formulas. (4 points)

□○□=□

□○□=□

□○□=□

□○□=□

Seven, solve the problem (20 points)

1、 ? Branch 2,

15 branch

□□□□□□□□ =□ (this )□□□□□□ □ =□ (this)

3、

Here come three more. How many are there in a * *?

□□□□□□□ =□ (only)

4、

=

5. There are a group of lambs on the grass, 10 lambs have gone, and 5 lambs have gone. How many lambs have left?

□□□□□□□ =□ (only)

6. A box contains 15 pens. I took some, and there are nine left. How many pens did you take?

□□□□□□□ =□ (only)