Question

A)15+9/3                                 B)4/9-5/18                  C)3/5 nhân 5/7                 d)4/7:2/7

làm bước trung gian giúp mình nhé

Answer 1

\(a,15+\dfrac{9}{3}=\dfrac{45}{3}+\dfrac{9}{3}=\dfrac{54}{3}=18\)

\(b,\dfrac{4}{9}-\dfrac{5}{18}=\dfrac{8}{18}-\dfrac{5}{18}=\dfrac{3}{18}\)

\(c,\dfrac{3}{5}\times\dfrac{5}{7}=\dfrac{3}{7}\)

\(d,\dfrac{4}{7}:\dfrac{2}{7}=\dfrac{4}{7}\times\dfrac{7}{2}=2\)