    34 34 21 15 7342134157 = 15 19 7 20 30.25...

Câu 1

 

34

34

21

15

7

34

21

34

15

7

=

15

19

7

20

3

0.25 =1 – 1 +

3

7

=

3

7

1

3

d) 6 – 3.

= 6 – 3 .

1

27

3

= 6 +

1

9

=

55

9