Question

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

giả hộ mình vs tất cả số trên đều là phân số

 

Answer 1

\(\dfrac{3}{7}+\left(-\dfrac{5}{2}\right)+\left(-\dfrac{3}{5}\right)=\dfrac{30}{70}+\left(-\dfrac{175}{70}\right)+\left(-\dfrac{42}{70}\right)=-\dfrac{187}{70}\)

Answer 2

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

\(=\dfrac{30}{70}-\dfrac{175}{70}-\dfrac{42}{70}=-\dfrac{187}{70}\)

Answer 3

\(\dfrac{3}{7}+\dfrac{-5}{2}+\dfrac{-3}{5}=\dfrac{-29}{14}+\dfrac{-3}{5}=\dfrac{-145}{70}+\dfrac{-42}{70}=\dfrac{-187}{70}\)