Đúng rồi em ạ :)

đúng đó nhưng bạn nên nhóm \(\frac{-22}{3}\)và \(\frac{-5}{3}\)vào với nhau và đặt \(\frac{5}{9}\)ra ngoài sẽ tính nhanh hơn

Đúng r đấy e

\(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)

\(=\frac{5}{9}:\left(\frac{2}{22}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{10}{15}\right)\)

\(=\frac{5}{9}:\frac{\left(-3\right)}{22}+\frac{5}{9}:\frac{\left(-9\right)}{15}\)

\(=\frac{5}{9}.\frac{22}{\left(-3\right)}+\frac{5}{9}.\frac{15}{\left(-9\right)}\)

\(=\frac{5}{9}.\left(\frac{-22}{3}+\frac{-15}{9}\right)\)

\(=\frac{5}{9}.\left(\frac{-66}{9}+\frac{-15}{9}\right)\)

\(=\frac{5}{9}.\frac{\left(-81\right)}{9}=-5\)

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

\(=\left(\frac{-2}{3}+\frac{3}{7}+\frac{-1}{3}+\frac{4}{7}\right):\frac{4}{5}\)

\(=\left[\left(\frac{-2}{3}+\frac{-1}{3}\right)+\left(\frac{3}{7}+\frac{4}{7}\right)\right]:\frac{4}{5}\)

\(=\left[\left(-1+1\right)\right]:\frac{4}{5}\)

\(=0:\frac{4}{5}=0\)

~ Hok tốt ~

cau A= o nha ban con cau B minh ko chac vi so minh ra hoi lon 1 ti

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

=\(\left[\left(-\frac{2}{3}+\frac{3}{7}\right)+\left(-\frac{1}{3}+\frac{4}{7.}\right)\right]:\frac{4}{5}\)

=\(\left[-\frac{5}{21}+\frac{5}{21}\right]:\frac{4}{5}\)

=\(0:\frac{4}{5}=0\)

b,\(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)

=\(\frac{5}{9}:\left[\left(\frac{1}{11}-\frac{5}{22}\right)+\left(\frac{1}{15}-\frac{2}{3}\right)\right]\)

=\(\frac{5}{9}:\left[-\frac{3}{22}-\frac{3}{5}\right]\)

=\(\frac{5}{9}:\left[-\frac{81}{110}\right]\)

=\(-\frac{550}{729}\)

#hok tốt#

\(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)

\(=\frac{5}{9}:\left(\frac{-3}{22}\right)+\frac{5}{9}:\left(\frac{-3}{5}\right)\)

\(=\frac{5}{9}.\left(-\frac{22}{3}\right)+\frac{5}{9}.\left(-\frac{5}{3}\right)\)

\(=\frac{5}{9}.\left[-\frac{22}{3}+\left(-\frac{5}{3}\right)\right]\)

\(=\frac{5}{9}.\left(-9\right)\)

\(=-5\)

\(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)

\(=\frac{5}{9}:\left[\left(\frac{1}{11}-\frac{5}{22}\right)+\left(\frac{1}{15}-\frac{2}{3}\right)\right]\)

\(=\frac{5}{9}:\left[-\frac{3}{22}-\frac{3}{5}\right]\)

\(=\frac{5}{9}:\frac{-81}{110}=\frac{5}{9}.\frac{-110}{81}\)

\(=-\frac{550}{729}\)

\(\frac{5}{9}:\frac{-3}{22}+\frac{5}{9}:\frac{-3}{5}\)

=\(\frac{5}{9}.\frac{-22}{3}+\frac{5}{9}.\frac{-5}{3}\)

=\(\frac{5}{9}.\left(\frac{-22}{3}-\frac{5}{3}\right)\)

=\(\frac{5}{9}.\left(-9\right)\)

=-5

cái ảnh của minh anh coi truong 

 gớm

Ta có: \(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)\)

\(=\frac{5}{9}:\left(\frac{2}{22}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{10}{15}\right)\)

\(=\frac{5}{9}:\frac{-3}{22}+\frac{5}{9}:\frac{-9}{15}=\frac{5}{9}\cdot\frac{-22}{3}+\frac{5}{9}\cdot\frac{-5}{3}\)

\(=\frac{5}{9}\left(-\frac{22}{3}+\frac{-5}{3}\right)=\frac{5}{9}\cdot-9=-5\)

BT = \(\frac{5}{9}\left(\frac{2}{22}-\frac{5}{22}\right)+\frac{5}{9}\left(\frac{1}{15}-\frac{10}{15}\right)\)

= \(\frac{5}{9}.\frac{-3}{22}+\frac{5}{9}.\frac{-3}{5}\)

= \(\frac{-5}{3}\left(\frac{1}{22}+\frac{1}{5}\right)\) = \(\frac{-5}{3}\left(\frac{5}{110}+\frac{22}{110}\right)\) = \(\frac{-5}{3}.\frac{27}{110}=\frac{-9}{22}\)

\(\frac{5}{9}.\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}.\left(\frac{1}{15}-\frac{2}{3}\right)\)

= \(\frac{5}{9}.\left(-\frac{3}{22}\right)+\frac{5}{9}.\left(-\frac{3}{5}\right)\)

= \(\frac{5}{9}.\left(-\frac{3}{22}+\frac{-3}{5}\right)\)

= \(\frac{5}{9}.\left(-\frac{81}{110}\right)\)

= \(-\frac{9}{22}\)