Question

Mọi người giải giúp em với ạ 

2/3 . 7/5 + 2/3 . (-2/5)

Answer 1

\(\dfrac{2}{3}.\dfrac{7}{5}+\dfrac{2}{3}.\left(-\dfrac{2}{5}\right)\)

\(=\dfrac{2}{3}\left(\dfrac{7}{5}-\dfrac{2}{5}\right)\)

\(=\dfrac{2}{3}.1\)

\(=\dfrac{2}{3}\)

Answer 2

`2/3. 7/5 + 2/3 . (-2)/5`

`=2/3 . (7/5 + (-2)/5)`

`=2/3 . (7/5 + (-2)/5)`

`=2/3 . 5/5`

`=2/3.1`

`=2/3`

Answer 3

= 2/3. 7/5  + 2/3 . (-2/5 )
= 2/3. (7/5 + (-2/5 )
= 2/3. 1
= 2/3