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