Умаляю помогитеееее

1) -0.5 +2 3/4 - 2.75 + 1/2 = -0.5+2.75-2.75+0.5=0

2) -2.6 + 1 1/3 + 8 2/3 = -2.6 + 10 = 7.4

3) -2.9-0.1-0.83+0.23 = -3-0.6=-3.6

4) -2.3+2.5-11.2=0.2-11.2 = -11

5) -4.2+ 11 1/7 - 1 1/7=-4.2+10 = 5.8

6) 8.9-7.8+6.7-9.7=1.1-3 = -1.9