1вариант.
1.=5-7=-2
2.=4*3=12
3.=2*3-6=6-6=0
4.=8:30=8/30=4/15
5.=0.6+0.1=0.7
6.=1/8*0.8-1=0.1-1=-0.9
7.=-3*0.7+2.6=2.6-2.1=0.5
8.=0.4*0.2=0.08
9.=4-1.5=2.5
10.7*2/7=2
2 вариант.
1.=9-4=5
2.=2*7=14
3.=2*3-8=6-8=-2
4.=5/20=1/4=0.25
5.=0.1-0.6=-0.5
6.=1\9*0.9-1=0.1-1=-0.9
7.=-5*0.5+2.4=2.4-2.5=-0.1
8.=0.9*0.3=0.27
9.=9-7.5=1.5
10.6*5/6=5