вичислите:

1)4-7/12 +1 целая 5/6 +2целых 1/3 -1/4

4-7/12+1 5/6+2 1/3-1/4=7 1/3
1) 4-7/12=3 12/12-7/12=3 5/12
2) 3 5/12+1 5/6=3 5/12+1 10/12=4 15/12=5 3/12
3) 5 3/12+2 1/3=5 3/12+2 4/12=7 7/12
4) 7 7/12-1/4=7 7/12-3/12=7 4/12=7 1/3