Question

[nguyễn hải an]

trả lời  hộ mình

Answer 1

[Trần Thu Hà]

\(a,\)\(\frac{9}{16}-\frac{3}{8}\)\(=\frac{9}{16}-\frac{6}{16}=\frac{3}{16}\)

\(b,\)\(\frac{5}{9}\times\frac{3}{8}=\frac{5\times3}{3\times3\times8}=\frac{5}{24}\)

\(c,\)\(\frac{5}{6}+\frac{9}{12}\div\frac{18}{5}\)\(=\frac{5}{6}+\frac{9}{12}\times\frac{5}{18}\)\(=\frac{5}{6}+\frac{9\times5}{12\times2\times9}\)\(=\frac{5}{6}+\frac{5}{24}\)\(=\frac{20}{24}+\frac{5}{24}=\frac{25}{24}\)

\(d,\)\(\frac{1}{2}\div\frac{1}{2}\div\frac{1}{2}\)\(=1\div\frac{1}{2}=1\times2=2\)