Ответ:
поможет нет?
Пошаговое объяснение:
1)- 9 1/12-(-7)=-109/12+7/1=-109/12+84/12=-25/12=-2 1/12
20-(-7)=20+7=27
-2 1/12<27
2)-9 1/12-16=-109/12-16/1=-109/12-192/12=-301/12=-25 1/12
20-16=4
-25 1/12<4
3)-9 1/12-4 1/6=-109/12-25/6=-109/12-50/12=-159/12=-13 3/12=-13 1/4
20-4 1/6=20/1-25/6=120/6-25/6=95/6=15 5/6
- 13 1/4<15 5/6
4) -9 1/12-(-3 2/3)=-109/12+11/3=-109/12+44/12=-65/12=-5 5/12
20-(-3 2/3)=20/1+11/3=60/3-11/3=49/3=16 1/3
-5 5/12<16 1/3
4839615≈4839620
4839615≈4839600
4839615≈4840000
4839615≈4840000
4839615≈4800000
4839615≈5000000
512............................
(х+27)-12=42
х+27-12=42
х+15=42
х=42-15
х=27
115-(35+у)=39
115-35-у=39
80-у=39
-у=39-80
-у=-41
у=41