1) - 2/9 + (2/9 - 3/4)=( -2/9 + 2/9) -3/4= -3/4
2) 4/7 - (5/11 - 3/7)=( 4/7 + 3/7) -5/11= 7/7 - 5/11= 1 - 5/11 = 11/11 - 5/11= 6/11
3) 3 5/6 +( -5/6 -1/7) = ( 3 5/6 - 5/6) -1/7 = 3 - 1/7 = 2 6/7
4) 3/8 - ( 1/9 -5/8) =(3/8 +5/8) -1/9 =8/8 - 1/9 = 1 -1/9 = 8/9
5) 2 3/4 - (1 1/4 + 5 1/2)= (2 3/4 - 1 1/4) - 5 1/2= 1 2/4 - 5 1/2 = 1 1/2 - 5 1/2 =
- (5 1/2 -1 1/2)= -4
6) 6 5/8 -( 1 3/4 - 2 3/8) = ( 6 5/8 + 2 3/8) - 1 3/4= 9 - 1 3/4 = 7 1/4
1) - 2/9 + (2/9 - 3/4)=( -2/9 + 2/9) -3/4= -3/4
2) 4/7 - (5/11 - 3/7)=( 4/7 + 3/7) -5/11= 7/7 - 5/11= 1 - 5/11 = 11/11 - 5/11= 6/11
3) 3 5/6 +( -5/6 -1/7) = ( 3 5/6 - 5/6) -1/7 = 3 - 1/7 = 2 6/7
4) 3/8 - ( 1/9 -5/8) =(3/8 +5/8) -1/9 =8/8 - 1/9 = 1 -1/9 = 8/9
5) 2 3/4 - (1 1/4 + 5 1/2)= (2 3/4 - 1 1/4) - 5 1/2= 1 2/4 - 5 1/2 = 1 1/2 - 5 1/2 =
- (5 1/2 -1 1/2)= -4
6) 6 5/8 -( 1 3/4 - 2 3/8) = ( 6 5/8 + 2 3/8) - 1 3/4= 9 - 1 3/4 = 7 1/4