БЫСРО И СРОЧНО ПЛИЗ ПОЖАЛУСТА СРОЧНО!!!!!!!!!!!!!

1) - $\frac{2}{9}$ + ( $\frac{2}{9} - \frac{3}{4} )$ = - $\frac{2}{9} + (-\frac{19}{36}) = -\frac{2}{9} - \frac{19}{36} = - \frac{3}{4}$

2) 4/7 - (5/11-3/7) = 4/7-2/77=6/11

3) 3 5/6 + (-5/6-1/7) = 23/6+(-41/42)=23/6-41/42=20/7

4) 3/8 - (1/9 - 5/8) = 3/8 - (-37/72)=3/8+37/72=8/9

5) 2 3/4 - (1 1/4 + 5 1/2) = 11/4 - (1+5+(1/4+1/2)) = 11/4 - (6+ 3/4) = 11/4 - 6 3/4= 11/4 - 27/4 = -4

6) 6 5/8 - (1 3/4 - 2 3/8) = 53/8 - (7/4 - 19/8)= 53/8 - (-5/8) = 53/8 + 5/8 = 29/4

Там где / это дробь)))