Question

 giúp mik với

 

 

Answer 1

\(d,=\left(\dfrac{1}{12}+\dfrac{11}{12}\right)+\left(\dfrac{1}{5}-\dfrac{6}{5}\right)+\dfrac{1}{71}=1-1+\dfrac{1}{71}=\dfrac{1}{71}\\ e,=\dfrac{2}{3}-4\cdot\dfrac{5}{4}=\dfrac{2}{3}-5=-\dfrac{13}{3}\\ f,=\left(-\dfrac{7}{5}\right)\left(25\dfrac{1}{7}-15\dfrac{1}{7}\right)+\dfrac{4}{5}=\left(-\dfrac{7}{5}\right)\cdot10+\dfrac{4}{5}=\dfrac{4}{5}-14=-\dfrac{66}{5}\)