A, correspondingly 1,

12 1 6 1

2、29 3、

seven

three

22 4,7 is greater than or equal to 7 5,

12 1 1 50

19 7、 17 5 1

8、2

45 5

four

9、9 1 92 9495979

eight

10、4 3 6 2

Second, I am a little judge.

Wrong to right, right to wrong, three, choose the best CCBCAA.

Fourth, the calculation of good questions is clever.

leave out

5. Find the least common multiple of the following groups.

18 77 48

6. Find the greatest common divisor of each group number below.

5 6 1

Sixth, practice small experts.

leave out

Seven, wisdom to solve life problems

1、70 2、23 3、( 1)30 (2)4

1

4、( 1)

20 17 (2)37

20 5、7

Eight, improve the problem

1、 1 12 15、22429、224

30

2、34 3、 17