Question

Answer 1

a: \(=\dfrac{-11}{5}+\dfrac{2}{7}-\dfrac{13}{13}+\dfrac{5}{7}-\dfrac{1}{13}=-\dfrac{11}{5}\)

b: \(=\dfrac{12}{17}\left(\dfrac{5}{7}+\dfrac{1}{7}+\dfrac{1}{7}\right)=\dfrac{12}{17}\)

c: \(=\left(\dfrac{1}{3}-\dfrac{13}{6}\right)^2:-\dfrac{119}{36}\)

\(=\dfrac{121}{36}\cdot\dfrac{36}{-119}=\dfrac{-121}{119}\)

d: \(=\dfrac{1}{5}-\dfrac{4}{5}-\dfrac{2}{5}=-\dfrac{5}{5}=-1\)

f: \(=\left(-\dfrac{2}{3}\right)+\dfrac{2^{40}\cdot3^{29}}{2^{39}\cdot3^{30}}=\dfrac{-2}{3}+\dfrac{2}{3}=0\)