Question

Answer 1

a) 3\(\dfrac{1}{6}\)
b) \(\dfrac{40}{21}\)
c) \(\dfrac{333}{28}\)

Answer 2

\(a,2\dfrac{1}{2}+\dfrac{2}{3}=\dfrac{5}{2}+\dfrac{2}{3}=\dfrac{15}{6}+\dfrac{4}{6}=\dfrac{19}{6}\\ b,2\dfrac{2}{3}:1\dfrac{2}{5}=\dfrac{8}{3}:\dfrac{7}{5}=\dfrac{8}{3}\times\dfrac{5}{7}=\dfrac{40}{21}\)

\(c,2\dfrac{4}{7}\times4\dfrac{5}{8}=\dfrac{18}{7}\times\dfrac{37}{8}=\dfrac{333}{28}\)