A) THỰC HIỆN PHÉP TÍNH A 6 3 9 3   2 4 5

2 .3 4 .9 5 .7 25 .49 2 .3 .3 2 .3 5 .7 5 .7 .7Lời giải: a) A 2 .3 8 .3 125.7 5 .14 2 .3 .3 2 .3 5 .7 5 .7 .2   

6

3

9

3

12

5

12

5

9

3

9

3

3

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  ^{ }

2

4

5

 

12

4

10

3