Question

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a,\(\dfrac{1}{3}\)x\(\dfrac{3}{5}\)x\(\dfrac{5}{9}\)                             b,4x\(\dfrac{5}{18}\)                 c,\(\dfrac{7}{8}\):2           d,\(\dfrac{15}{16}\):\(\dfrac{3}{8}\)x\(\dfrac{3}{4}\)

Answer 1

\(a.\dfrac{1}{3}\times\dfrac{3}{5}\times\dfrac{5}{9}=\dfrac{1}{5}\times\dfrac{5}{9}=\dfrac{1}{9}\)

\(b.4\times\dfrac{5}{18}=\dfrac{20}{18}=\dfrac{10}{9}\)

\(c.\dfrac{7}{8}:2=\dfrac{7}{8}\times\dfrac{1}{2}=\dfrac{7}{16}\)

\(d.\dfrac{15}{16}:\dfrac{3}{8}\times\dfrac{3}{4}=\dfrac{5}{2}\times\dfrac{3}{4}=\dfrac{15}{8}\)

Answer 2

\(a,\dfrac{1}{3}\times\dfrac{3}{5}\times\dfrac{5}{9}=\dfrac{3}{15}\times\dfrac{5}{9}=\dfrac{15}{135}=\dfrac{1}{9}\)

\(b,4\times\dfrac{5}{18}=\dfrac{20}{18}=\dfrac{10}{9}\)

\(c,\dfrac{7}{8}:2=\dfrac{7}{8}\times\dfrac{1}{2}=\dfrac{7}{16}\)

\(d,\dfrac{15}{16}:\dfrac{3}{8}\times\dfrac{3}{4}=\dfrac{15}{16}\times\dfrac{8}{3}\times\dfrac{3}{4}=\dfrac{120}{48}\times\dfrac{3}{4}=\dfrac{5}{2}\times\dfrac{3}{4}=\dfrac{15}{8}\)

Answer 3

a, \(\dfrac{1}{3}\) x \(\dfrac{3}{5}\) x \(\dfrac{5}{9}\) = \(\dfrac{1}{5}\) x  \(\dfrac{5}{9}\) = \(\dfrac{1}{9}\)

b, 4 x \(\dfrac{5}{18}\) = \(\dfrac{10}{9}\)

c, \(\dfrac{15}{16}\) : \(\dfrac{3}{8}\) x \(\dfrac{3}{4}\) = \(\dfrac{5}{2}\) x \(\dfrac{3}{4}\) = \(\dfrac{15}{8}\)