1. 5/9+ 4/9+(7/10+3/10) 2. 7+2 4/7 + (11 2/7+ 4) 3. 24/19-16/19-(33-27/40) 4. 7-2 3/8 -(15-7 25 31) 5. 25 7/11 -19 5/11-(38 15/26-9 8/26)

1. 5/9 + 4/9 + (7/10 + 3/10) = 9/9 + 10/10 = 1+1=2.2. 7+2 4/7+(11 2/7+4)=49/7+18/7+(79/7+28/7)=67/7+107/7=174/7= 24 6/7.