1、3 20 12
2,811or 4 1 2 or 4 2 1
3、24 8
4、400 6
5、 1000 100
6、64 72
7、48 24?
8、5
9.1.02m3 =( 1020) cubic decimeter =( 1020) liter?
470 ml =(470) cubic centimeter =(0.47) liter?
10, a bottle of ink is about 50 ml, and the volume of a goldfish bowl is about 38 cubic decimeters.
The cover of a math textbook is about 280 (square centimeter), and the volume of a refrigerator is 1.5 (cubic meter).
1 1、32 136 96?
36 2 16 2 16
12、 1000 3?
13、60 66
Second, multiple choice questions
1、B 2、C 3、B 4、C 5、B 6、A 7、A 8、A
Third, the operation questions
1, omitted
2、6a2 10a2 14a2 22a2
3.30×2+20×2+25×4+25=225 (cm) 225 cm =22.5 decimeter.