Câu hỏi của Nguyễn Thành Đạt

Question

Tính:
a, $\left(-\frac{2}{3}+\frac{3}{7}\right):\frac{4}{5}+\left(-\frac{1}{3}+\frac{4}{7}\right):\frac{4}{5}$

b, \(\frac{5}{9}:\left(\...

Nguyễn Ngọc Quý · Accepted Answer

$=\frac{5}{4}.\left(-\frac{1}{3}+-\frac{1}{3}+\frac{3}{7}+\frac{4}{7}\right)=\frac{5}{4}.0=0$

$=\frac{9}{5}\left(-\frac{3}{22}+-\frac{3}{5}\right)=-\frac{729}{550}$

Câu trả lời:

$=\frac{5}{4}.\left(-\frac{1}{3}+-\frac{1}{3}+\frac{3}{7}+\frac{4}{7}\right)=\frac{5}{4}.0=0$

$=\frac{9}{5}\left(-\frac{3}{22}+-\frac{3}{5}\right)=-\frac{729}{550}$