Question

1) \(\dfrac{2}{15}\) + (\(\dfrac{-5}{24}\) )

2) \(\dfrac{-5}{9}\) -( \(\dfrac{-7}{27}\) )

mn giúp mik vs ạ  

Answer 1

`2/15 + (-5)/24 = 2/15 - 5/24 = 16/120 - 25/120 = (16-25)/120 = (-9)/120 = (-3)/40`

 

`(-5)/9 - (-7)/27 = (-5)/9 + 7/27 = (-15)/27 + 7/27 = (-15+7)/27 = (-8)/27`

Answer 2

\(\dfrac{2}{15}\) + \(\dfrac{-5}{24}\) = \(\dfrac{-3}{40}\)

\(\dfrac{-5}{9}\) - (\(\dfrac{-7}{27}\)) = \(\dfrac{-8}{27}\)