Question

Thực hiện phép tính:

( -5/8+ 7/6- 4/5 ) - ( 5/6 - 7/6- 7/5)+ (3/4+5/3+12/5)

Answer 1

\(\left(\dfrac{-5}{8}+\dfrac{7}{6}-\dfrac{4}{5}\right)-\left(\dfrac{5}{6}-\dfrac{7}{6}-\dfrac{7}{5}\right)+\left(\dfrac{3}{4}+\dfrac{5}{3}+\dfrac{12}{5}\right)\)

=\(\left(\dfrac{\left(-75\right)+140-96}{120}\right)-\left(\dfrac{25-35-42}{30}\right)+\left(\dfrac{45+100+144}{60}\right)\)

=\(\dfrac{-31}{120}-\dfrac{-26}{15}+\dfrac{289}{60}=\dfrac{\left(-31\right)-\left(-208\right)+578}{120}\)

=\(\dfrac{151}{24}\)