Question

Tính rồi rút gọn.

a) \(\dfrac{5}{11}\times\dfrac{11}{6}\)                            b) \(7\times\dfrac{6}{21}\)

Answer 1

a) \(\dfrac{5}{11}\times\dfrac{11}{6}\)

\(=\dfrac{5\times11}{11\times6}\)

\(=\dfrac{5}{6}\)

b) \(7\times\dfrac{6}{21}\)

\(=\dfrac{7\times6}{21}\)

\(=\dfrac{6}{3}\)

\(=2\)

Answer 2

a: \(=\dfrac{5\cdot11}{11\cdot6}=\dfrac{5}{6}\)

b: \(=7\cdot\dfrac{2}{7}=2\)