Question

(7/9+5/6)x3/5 tính bằng hai cách . Giúp mình nha

Answer 1

`(7/9+5/6)xx3/5`

`=(42/54+45/54)xx3/5`

`=87/54xx3/5`

`=261/270`

`=29/30`

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`(7/9+5/6)xx3/5`

`=7/9xx3/5+5/6xx3/5`

`=24/45+15/30`

`=48/90+45/90`

`=93/90`

`=31/30`

Kq lạ z =))