First, oral calculation.

3+6= 8+7= 13-6= 25-5= 10+0= 25+5= 10-8= 9-4= 30+40= 40+60=

Fill in the blanks.

1、36 ( ) 26 ( ) 45 ( ) 40 ( ) 56 -8 =( ) 2 + 30 =( ) 78

( ) 70 (

) 89 ( ) 45 ( )

2. Fill in the blanks with "up, down, left and right". △□☆○○○ Left: △ is on the edge of □ (); ☆ On the side of □ (); ? ○ In? () side; □ On the edge of ☆ ().

3. The number consisting of three tens and eight ones is (); 100 consists of () ten; There are () ten out of 80; There are () ten and 8 () in 78. The number of 6 digits and 7 digits is (); One of 43 is () and ten are ().

4. 3 yuan = () jiao 6 jiao = () 80 jiao = () yuan 100 yuan can be exchanged for () a 20 yuan, which can be exchanged for () a 10 yuan or () a 50 yuan. RMB 1 yuan from 5 yuan can be exchanged for RMB () from 2 yuan and RMB () from 1 yuan.

5. Fill in the blanks in numerical order.

70 65 50 46 66 76 99 98 94

6、 △△△△△ ▲▲▲▲▲ △△△△ ▲▲ ( ) ○( )= ( )

Third, calculation.

13-7 = 85-5 = 98-40 = 37-9 = 73-70 = 46+40 = 73+9 = 26+7 = 40+50 = 90- 10 = 42-8 = 89-3.

Four. Fill in ">"

26+9 03615-7 08 47-8 038 75+20 094 8 yuan 3 jiao 85 jiao.

Fifth, the application of mathematics.

1. There are 12 yellow dogs and flower dogs in the zoo, 9 yellow dogs, how many flowers?

A: Only flowers.

2. Xiaohong bought a book by 15 yuan and a pen by 8 yuan with the money from 30 yuan. How much should the salesman get back?

You should get the RMB back.

There are 90 books in the small library, and 40 books have been lent out. How many books are left?

A: There are still books left.

4. 1 (2) Class students get 58 flowers, boys get 30 flowers, and girls get how many flowers?

A: Girls fold flowers.

The breeder keeps 25 white rabbits and 8 black rabbits. * * * How many rabbits?

A: * * Keep rabbits.