Question

-3/8 -5/12

7/12 - -9/20

-1/21+ -1/28

-4/8 + -3/10

Answer 1

a: \(=\dfrac{-3}{8}-\dfrac{5}{12}=\dfrac{-9}{24}-\dfrac{10}{24}=\dfrac{-19}{24}\)

b: \(=\dfrac{7}{12}+\dfrac{9}{20}=\dfrac{35}{60}+\dfrac{27}{60}=\dfrac{62}{60}=\dfrac{31}{30}\)

c: \(=-\dfrac{1}{21}-\dfrac{1}{28}=\dfrac{-4}{84}-\dfrac{3}{84}=\dfrac{-7}{84}=-\dfrac{1}{12}\)

d: \(=-\dfrac{1}{2}-\dfrac{3}{10}=\dfrac{-5}{10}-\dfrac{3}{10}=\dfrac{-8}{10}=-\dfrac{4}{5}\)