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

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

\(=\dfrac{-5}{9}\cdot\dfrac{110}{81}=\dfrac{-550}{729}\)

\(\frac{5}{9}:\left(\frac{1}{11}-\frac{5}{22}\right)+\frac{5}{9}:\left(\frac{1}{15}-\frac{2}{3}\right)=\frac{5}{9}:-\frac{3}{22}+\frac{5}{9}:-\frac{3}{5}=-\frac{110}{27}+-\frac{25}{27}=-5\)

5/9 : (2/22 -5/22) + 5/9 : (1/15 -10/15)

=5/9 : -3/22+5/9: -3/5

= -110/27+ -25/27

=   -5

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

=\(-5\)

5/9 : (1/11 - 5/22) + 5/9:(1/15 - 2/3) = 5/9 x -22/3 + 5/9 x -5/3

                                                    = 5/9 x (-22/3 + -5/3) = 5/9 x -9 = -5

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

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

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

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

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

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

\(=\frac{-45}{9}=-5\)

Mk lộn:

5/9/(1/11-5/22)+5/9/(1/15-2/3)

=-5

5/9/(1/11-5/22)+5/9/(1/15-2/3)

=(107+5) /107-8 < (108+6) /108-7

cách làm wa khó hiểu

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

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

\(=\dfrac{5}{9}:\dfrac{-81}{110}=-\dfrac{550}{729}\)

`5 / 9 : ( 1 / 11 - 5 / 22 ) + 5 / 9 : ( 1 / 15 - 2 / 3 )`

`= 5 / 9 : ( 2 / 22 - 5 / 22 ) + 5 / 9 : ( 1 / 15 - 10 / 15 )`

`= 5 / 9 : [-3] / 22 + 5 / 9 : [-3] / 5`

`= 5 / 9 . [-22] / 3 + 5 / 9 . [-5] / 3`

`= 5 / 9 ( [-22] / 3 + [-5] / 3 )`

`= 5 / 9 . [-27 ] / 3`

`= 5 / 9 . (-9)`

`=-5`