Tính, 16/3-17/6

b, 31/10 +3

c, 4+ 11/3

B, rút gọn rồi tính

a,8/5- 18/5

b,78/42- 4/7

c, 10/12- 12/36

`#161`

`A.`

`a, 16/3 - 17/6`

`= 32/6 - 17/6`

`= 15/6`

`___`

`b, 31/10 + 3`

`= 31/10 + 3/1`

`= 31/10 + 30/10`

`= 61/10`

`___`

`c, 4 + 11/3`

`= 4/1 + 11/3`

`= 12/3 + 11/3`

`= 23/3`

`__________`

`B.`

`a, 8/5 - 18/5`

`= -10/5 = -2`

`___`

`b, 78/42 - 4/7`

`= 13/7 - 4/7`

`= 9/7`

`___`

`c, 10/12 - 12/36`

`= 5/6 - 1/3`

`= 5/6 - 2/6`

`= 3/6 = 1/2`

`@TGN`