Question

Thực hiện phép tính :

\(\dfrac{-2}{5}-\dfrac{-3}{11}\)

Answer 1

\(=\dfrac{-10}{55}+\dfrac{15}{55}=\dfrac{5}{55}=\dfrac{1}{11}\)

Answer 2

\(\dfrac{-2}{5}-\dfrac{-3}{11}=\dfrac{-2}{5}+\dfrac{3}{11}=\dfrac{-22}{55}+\dfrac{15}{55}=\dfrac{-7}{55}\)

Answer 3

\(-\dfrac{2}{5}-\dfrac{-3}{11}=-\dfrac{2}{5}+\dfrac{3}{11}=-\dfrac{22}{55}+\dfrac{15}{55}=-\dfrac{7}{55}\)