Question

Tính (theo mẫu):

a) \(\dfrac{5}{6}\times7\)                      b) \(\dfrac{7}{10}\times3\)                    c) \(5\times\dfrac{4}{21}\)                     d) \(2\times\dfrac{5}{9}\)

Answer 1

a: \(\dfrac{5}{6}\cdot7=\dfrac{5\cdot7}{6}=\dfrac{35}{6}\)

b: \(\dfrac{7}{10}\cdot3=\dfrac{7\cdot3}{10}=\dfrac{21}{10}\)

c: \(5\cdot\dfrac{4}{21}=\dfrac{5\cdot4}{21}=\dfrac{20}{21}\)

d: \(2\cdot\dfrac{5}{9}=\dfrac{2\cdot5}{9}=\dfrac{10}{9}\)