11/15.12/13-7/30+11/15.14/13 Giúp em với ạ

Đáp án:

`37/30`

Giải thích các bước giải:

`11/15. 12/13-7/30+11/15. 14/13`

`= 11/15. 12/13-11/15. 7/22+11/15. 14/13`

`= 11/15. (12/13-7/22+14/13)`

`= 11/15. [(12/13+14/13)-7/22]`

`= 11/15. (26/13-7/22)`

`= 11/15. (2-7/22)`

`= 11/15. (44/22-7/22)`

`= 11/15. 37/22`

`= 407/330`

`= 37/30`

Vậy `11/15. 12/13-7/30+11/15. 14/13 = 37/30`