2.77+(-1/4) 1/3+(-1/2) 2 5/12+(-17 3/8) -29+17 1/8 17+(-1,25) -2 3/5+(-7 3/10) 4 3/4+(-4 11/12) ! 56б

2.77+(-1/4) = 2,77 - 0,25 = 2,52

1/3+(-1/2) = 2/6 - 3/6 = -1/6

2 5/12+(-17 3/8) = 2 10/24 - 17 9/24 = -14 23/24

-29+17 1/8 = -11 7/8

17+(-1,25) = 17 - 1,25 = 15,75

-2 3/5+(-7 3/10) = -2 6/10 - 7 3/10 = -9 9/10

4 3/4+(-4 11/12) = 4 9/12 - 4 11/12 = -2/12 = -1/6

2,77-0,25=2,52
1/3-1/2 = 2/6-3/6= -1/6
2 5/12 - 17 3/8 = 2 10/24 - 17 9/24= -(16 33/24-2 10/24)= -14 23/24
-29 + 17 1/8= -(28 8/8-17 1/8)= -11 7/8
17-1,25= 15,75
-2,6-7,3=-(2,6+7,3)=-9,9
4 3/4- 4 11/12= 4 9/12-4 11/12 = -(4 11/12-4 9/12 ) = -2/12= -1/6