11/9 + 18/5 -2/9 -3/5
= 11/9 - 2/ 9 + 18/5 - 3/5
= 9/9 + 15/5
= 1+ 3
= 4
11/9 + 18/5 -2/9 -3/5
= 11/9 - 2/ 9 + 18/5 - 3/5
= 9/9 + 15/5
= 1+ 3
= 4
11/9 + 18/5 -2/9 -3/5
= 11/9 - 2/ 9 + 18/5 - 3/5
= 9/9 + 15/5
= 1+ 3
= 4
=11/9 + 18/5 - 2/9 - 3/5
= 11x5/9x5 +18x9/5x9 - 2x5/9x5 - 3x9/5x9
= 55/45 + 162/45 - 10/45 - 27/45
= 55+162-10-27/45
= 180/45
= 4
\(\dfrac{11}{9}+\dfrac{18}{5}-\dfrac{2}{9}-\dfrac{3}{5}\)
=\(\left(\dfrac{11}{9}-\dfrac{2}{9}\right)+\left(\dfrac{18}{5}-\dfrac{3}{5}\right)\)
= \(\dfrac{9}{9}\) + \(\dfrac{15}{5}\)
= 1 + 3
= 4
11/9 + 18/5 -2/9 -3/5
= 11/9 - 2/ 9 + 18/5 - 3/5
= 9/9 + 15/5
= 1+ 3
= 4
Cái đầu bị lỗi thông cảm nhé