Г) 1/5+1/7-1/9 д) 13/18-1/24-(29/72+6/36) е) (7/8-4/5)+(1/20+1/4)+1/2

Г)1/5+1/7-1/9=0.6
1/5=0.2
1/7=0.15
1/9=1.11
0.2+0.15=0.17
0.17-0.11=0.6

д) 13/18-1/24-(29/72+6/36)=0.108
29/72=0.40
6/36=0.17
0.40+0.17=0.57
13/18=0.72
1/24=0.042
0.72-0.042=0.678
0.678-0.57=0.108

в)(7/8-4/5)+(1/20+1/4)+1/2=0.9
7/8=0.9
4/5=0.8
0.9-0.8=0.1
1/20=0.05
1/4=0.05
0.05+0.25=0.3
0.1+0.3=0.4
1/2=0.5
0.4+0.5=0.9