Question

Tính.

a) \(\dfrac{5}{6}\times\dfrac{1}{3}\)                             b) \(\dfrac{5}{6}:\dfrac{1}{3}\)                           c) \(\dfrac{5}{3}-\dfrac{1}{3}:\dfrac{1}{4}\)

Answer 1

a)

\(\dfrac{5}{6}\times\dfrac{1}{3}\\ =\dfrac{5\times1}{6\times3}=\dfrac{5}{18}\)

b)

\(\dfrac{5}{6}:\dfrac{1}{3}=\dfrac{5}{6}\times\dfrac{3}{1}\\ =\dfrac{15}{6}\\ =\dfrac{5}{2}\)

c)

\(\dfrac{5}{3}-\dfrac{1}{3}:\dfrac{1}{4}\\ =\dfrac{5}{3}-\dfrac{1}{3}\times4\\ =\dfrac{5}{3}-\dfrac{4}{3}\\ =\dfrac{1}{3}\)

Answer 2

\(a,\dfrac{5}{6}x\dfrac{1}{3}=\dfrac{5}{18}\\ b,\dfrac{5}{6}:\dfrac{1}{3}=\dfrac{5}{2}\\ c,\dfrac{5}{3}-\dfrac{1}{3}:\dfrac{1}{4}=\dfrac{5}{3}-\dfrac{4}{3}=\dfrac{1}{3}\)