Question

2.Tính: 1/3 + 3/5 + 2/3. 2/5 + 3/8 + 3/5.

Answer 1

`1/3 + 3/5 + 2/3`

`= (1/3 +2/3)+3/5`

`= 1 +3/5`

`= 5/5 +3/5`

`= 8/5`

`---`

`2/5 + 3/8 + 3/5`

`= (2/5+3/5)+3/8`

`=1 +3/8`

`=8/8+3/8`

`=11/8`

`@ yl`