\(B=\dfrac{-5}{3}\left(16+\dfrac{2}{7}-28-\dfrac{2}{7}\right)=-12\cdot\dfrac{-5}{3}=20\)

\(16\dfrac{2}{7}:\left(\dfrac{-3}{5}\right)+28\dfrac{2}{7}:\dfrac{3}{5}\)

\(=\left(-16-\dfrac{2}{7}+28+\dfrac{2}{7}\right)\cdot\dfrac{5}{3}\)

\(=12\cdot\dfrac{5}{3}=20\)

\(16\dfrac{2}{7}:\left(\dfrac{-3}{5}\right)+28\dfrac{2}{7}:\dfrac{3}{5}\)

\(=\left(-16-\dfrac{2}{7}\right)\cdot\dfrac{5}{3}+\left(28+\dfrac{2}{7}\right)\cdot\dfrac{5}{3}\)

\(=12\cdot\dfrac{5}{3}=20\)

Đề tự chép lại nha!

 \(\left(16\frac{2}{7}-28\frac{2}{7}\right)\):\(\left(\frac{-3}{5}\right)\)

= -12 :\(\left(\frac{-3}{5}\right)\)

= 20

Hk tốt

\(16\frac{2}{7}\div\frac{-3}{5}-28\frac{2}{7}\div\frac{-3}{5}\)

\(=\left[\left(16-28\right)\frac{2}{7}\right]\div\frac{-3}{5}\)

\(=-12\frac{2}{7}\div\frac{-3}{5}\)

\(=\frac{-84}{7}\div\frac{-3}{5}\)

\(=-12\div\frac{-3}{5}\)

\(=20\)

Học tốt!!!

=20 bn nhé

xấp xỉ -113595,7577

Khó quá đấy 

\(=\left(-16-\dfrac{2}{7}\right)\cdot\dfrac{5}{3}+\left(28+\dfrac{2}{7}\right)\cdot\dfrac{5}{3}\)

\(=\dfrac{5}{3}\left(-16-\dfrac{2}{7}+28+\dfrac{2}{7}\right)\)

\(=12\cdot\dfrac{5}{3}=20\)

\(16\frac{2}{7}:\left(-\frac{3}{5}\right)+28\frac{2}{7}:\frac{3}{5}\)

\(=\frac{114}{7}:\left(-\frac{3}{5}\right)+\frac{198}{7}:\frac{3}{5}\)

\(=-\frac{190}{7}+\frac{330}{7}\)

\(=20\)