tôi ...........................................đã có ny
mik khuyên bạn hãy chăm chỉ họ , đừng có yêu nữa nó làm khổ mik đó
D = \(\frac{9}{4}:\frac{9}{2}+\frac{4}{5}\)
D = \(\frac{1}{2}+\frac{4}{5}\)
D = \(\frac{5}{10}+\frac{8}{10}\)
D = \(\frac{13}{10}\)
\(\frac{3}{10}-\frac{1}{4}:\frac{5}{2}\)
= \(\frac{3}{10}-\frac{1}{10}\)
= \(\frac{1}{5}\)
\(D=\frac{9}{4}\)\(\div\frac{9}{2}+\frac{4}{5}\)
\(D=\frac{9}{4}\times\frac{2}{9}+\frac{4}{5}\)
\(D=\frac{1}{2}+\frac{4}{5}\)
\(D=\frac{5}{10}+\frac{8}{10}\)
\(D=\frac{13}{10}\)
\(\frac{3}{10}-\frac{1}{4}\div\frac{5}{2}\)
\(=\frac{3}{10}-\frac{1}{4}\times\frac{2}{5}\)
\(=\frac{3}{10}-\frac{1}{10}\)
\(=\frac{2}{10}=\frac{1}{5}\)