1/3×-6/13×-9/10×-1+/30

2 câu trả lời

Đáp án:

 $\dfrac{1}{3} . \dfrac{-6}{13}. \dfrac{-9}{10}. \dfrac{-1}{30}$

$= (\dfrac{1}{3}.\dfrac{-1}{30}).(\dfrac{-6}{13}.\dfrac{-9}{10})$

$= \dfrac{-1}{90}.\dfrac{27}{65}$

$= \dfrac{-27}{5850}$

$= \dfrac{-3}{650}$

 

`1/3 xx (-6)/13 xx (-9)/10 xx (-1)/30` 

`= (-2)/13 xx (-9)/10 xx (-1)/30` 

`= 9/65 xx (-1)/30` 

`= (-3)/650`