gap ` 26/81 + 4/27 ` ` 24/36 - 6/12 ` ` 5/9 + 6/8 `

Đáp án+Giải thích các bước giải:

 Tính:

`26/81+4/27`

`=26/81+(4xx3)/(27xx3)`

`=26/81+12/81`

`=(26+12)/81`

`=38/81`

------------------------------------

`24/36-6/12`

`=(24:12)/(36:12)-(6:6)/(12:6)`

`=2/3-1/2`

`=4/6-3/6`

`=(4-3)/6`

`=1/6`

-------------------------------------

`5/9+6/8`

`=5/9+(6:2)/(8:2)`

`=5/9+3/4`

`=20/36+21/36`

`=(20+27)/36`

`=47/36`

`@lynhxynkdep`