20 17 the first volume of the seventh grade mathematics winter vacation life instructs the homework 1 1 the division answer of the same radix power. The reference answer of the first grade mathematics winter vacation life instructs the homework. A: First, knowledge navigation.

A, same base powers division base constant exponential subtraction; 1; 1/a m-np

Second, lay a solid foundation.

1、a、a？ 0, m, n m and n are all positive integers.

2、4; 1/4; x

3、a； -xy；

4、3

5、a； - 1

6、0.000 1; 0.00 124

7. abc (noun-noun)

8、6 ; 3/5

13、AADCB

14、 1/ 1000 1/64 0.000 16

15、a-2b

16 、- x；

17, x 95 455m +2

Third, expand the ability.

18、D

19、D

20、- 1/2; -3;

2 1、3;

22、 100;

23、-4/3 ; 24、9/2