Вычислите: 
3/4 - (1 1/3 - 1 1/6)
3 1/8 - 2 2/3 + 1/3
5 1/8 - (2 2/3 + 3/4) + 1/4

1)3/4-(4/3-7/6)=3/4-(8/6-7/6)=3/4-1\6=9/12-2/12=7/122) 25/8-8/3+1/3=25/8-7/3=75/24-56/24=19/243)41/8-8/3-3/4+1/4=41/8-8/3-2/4=123/24-64/24-12/24=123/24-76/24=47/24=1 23/24