Question

ai giúp mình mình cần gấp lắm

Answer 1

`2/7 + (-3)/8 + 11/7 + 1/3 + 1/7 + 5/(-8)`

`= (2/7 + 11/7 + 1/7) + (-3/8 + (-5)/8 ) +1/3`

`= 14/7 +(-8/8) + 1/3`

`= 14/7 + (-1) +1/3`

`= 14/7 + (-7/7) + 1/3`

`= 7/7+1/3`

`=1 +1/3`

`=3/3+1/3`

`=4/3`

Answer 2

= 0

Answer 3

Answer 4

\(\dfrac{2}{7}+\dfrac{-3}{8}+\dfrac{11}{7}+\dfrac{1}{3}+\dfrac{1}{7}+\dfrac{5}{-8}\)

\(=\left(\dfrac{2}{7}+\dfrac{11}{7}+\dfrac{1}{7}\right)+\left(\dfrac{-3}{8}+\dfrac{5}{-8}\right)+\dfrac{1}{3}\)

\(=\dfrac{14}{7}+\left(-1\right)+\dfrac{1}{3}=2+\left(-1\right)+\dfrac{1}{3}=1+\dfrac{1}{3}=\dfrac{4}{3}\)

Answer 5

\(\dfrac{2}{7}+-\dfrac{3}{8}+\dfrac{11}{7}+\dfrac{1}{3}+\dfrac{1}{7}+\dfrac{5}{-8}\)

\(=\left(\dfrac{2}{7}+\dfrac{11}{7}+\dfrac{1}{7}\right)+\left(-\dfrac{3}{8}-\dfrac{5}{8}\right)+\dfrac{1}{3}\)

\(=\dfrac{14}{7}+\left(-\dfrac{8}{8}\right)+\dfrac{1}{3}=2-1+\dfrac{1}{3}\)

\(=\dfrac{6}{3}-\dfrac{3}{3}+\dfrac{1}{3}=\dfrac{4}{3}\)