Question

Answer 1

a: =5/6-12/6=-7/6

b: \(=\dfrac{16-15}{40}=\dfrac{1}{40}\)

c: \(=\dfrac{-3\cdot8\cdot9-8\cdot7\cdot8-7\cdot9\cdot7}{7\cdot9\cdot8}=\dfrac{-1105}{504}\)

d: =-1/2-3/4=-5/4

e: \(=\dfrac{5}{3}-\dfrac{2}{3}+-\dfrac{7}{6}+\dfrac{1}{6}=1-1=0\)

Answer 2

\(\dfrac{5}{6}-2=\dfrac{-7}{6}\\ \dfrac{2}{5}+\dfrac{-3}{8}=\dfrac{1}{40}\\ \dfrac{-3}{7}+\dfrac{-8}{9}+\dfrac{-7}{8}=\dfrac{-1105}{504}\\ -\dfrac{1}{2}-\dfrac{2}{3}+\dfrac{-3}{4}+\dfrac{2}{3}=\dfrac{-5}{4}\\ \dfrac{5}{3}+\dfrac{-7}{6}-\dfrac{2}{3}+\dfrac{1}{6}=0\)

Answer 3