Выполните действия:
1)4/45+2/9;
2)2/15+5/6;
3)9/24-1/6;
4)7/12-3/20.

1)4/45+2/9 = 14/45
2)2/15+5/6 = 29/30
3)9/24-1/6 = 5/24
4)7/12-3/20 = 13/30

1)4/45+2/9=4/45+10/45=14/45
2)2/15+5/6=4/30+25/30=29/30
3)9/24-1/6=9/24-4/24=5/24
4)7/12-3/20=35/60-9/60=26/60=13/30