Question

Tính:
\(-\dfrac{5}{6}-\left(-\dfrac{3}{8}+\dfrac{1}{10}\right)\)

Answer 1

-67/120

Answer 2

\(-\dfrac{5}{6}-\left(-\dfrac{3}{8}+\dfrac{1}{10}\right)=-\dfrac{5}{6}+\dfrac{3}{8}-\dfrac{1}{10}=\dfrac{\left(-5\right).20+3.15-12}{120}=\dfrac{-67}{120}\)

Answer 3

\(-\dfrac{5}{6}-\left(-\dfrac{3}{8}+\dfrac{1}{10}\right)\)

\(=-\dfrac{5}{6}+\dfrac{3}{8}-\dfrac{1}{10}\)

\(=\dfrac{-40}{48}+\dfrac{18}{48}-\dfrac{1}{10}\)

\(=\dfrac{-22}{48}-\dfrac{1}{10}\)

\(=\dfrac{-11}{24}-\dfrac{1}{10}\)

\(=\dfrac{-110}{240}-\dfrac{24}{240}\)

\(=\dfrac{-134}{240}\)

\(=\dfrac{-67}{120}\)