First, oral calculation, see who is right and who is fast (8 points)

19+26= 6×7= 8×9= 40—23= 62-58=

42- 16+9= 9×6-48= 5×7+4=

Second, I can fill it correctly (26 points)

1, fill in the name of the corresponding unit, with a marked as 10 () and mom as 1( )62 ().

2.9 The number less than 35 is (), and () is 25 more than 43.

3. There are 3, 7 and 5 cards, and two cards can be randomly selected to form () two digits.

Xiao Ming wrote 29 words yesterday, 47 words today, about () words in two days.

5. Try counting.

There are () line segments in the above picture, and a * * * has () angles, including () right angles.

6. () () stands for addition, and the addition formula is:

_ _ _ _ _ _ _ _ _ _ _ Multiplication Format: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

7, there are three students shake hands, every two shake hands, you can shake hands () times.

8. Fill in "+","-","X" or "

8○6=48 36○73-37 9×7○65 18○9=9

9. What can I fill in?

( )×8