Question

4/3 + -11/3 1 + 3/10 - 30/3 1 - 2/5

Answer 1

đáp án là -83/930 

4/3+ -11/31 +3/10 - 30/31 -2/5

=91/93+3/10-30/31-2/5

=1189/930-30/31-2/5

=289/930-2/5

=-83/930

Answer 2

\(\dfrac{4}{3}+\dfrac{-11}{31}+\dfrac{3}{10}-\dfrac{30}{31}-\dfrac{2}{5}\)

\(=\left(\dfrac{-11}{31}-\dfrac{30}{31}\right)+\dfrac{4}{3}+\dfrac{3}{10}-\dfrac{2}{5}\)

\(=\dfrac{-41}{31}+\dfrac{4}{3}+\dfrac{3}{10}-\dfrac{2}{5}\)

\(=\dfrac{1}{93}+\dfrac{3}{10}-\dfrac{2}{5}=\dfrac{289}{930}-\dfrac{2}{5}=\dfrac{-83}{930}\)

Answer 3

     \(\dfrac{4}{3}+\dfrac{-11}{31}+\dfrac{3}{10}-\dfrac{30}{31}-\dfrac{2}{5}\)

=  \(\left(\dfrac{-11}{31}-\dfrac{30}{31}\right)+\dfrac{4}{3}+\dfrac{3}{10}-\dfrac{2}{5}\)

= \(\dfrac{-41}{31}+\dfrac{4}{3}+\dfrac{3}{10}-\dfrac{2}{5}\)

= \(\dfrac{1}{93}+\dfrac{3}{10}-\dfrac{2}{5}\)

= \(\dfrac{289}{930}-\dfrac{2}{5}\)

= \(\dfrac{-83}{930}\)