Д) 3/10 + 2/12 = е) 5/12 + 4/15 =
3/10 + 2/12 = 18/60 + 10/60 = 28/60 = 7/15
5/12 + 4/15 = 25/60 + 16/60 = 41/60
Забыл)))
3/10+ 2/12=18/60+10/60=28/60=7/15
е) 5/12 + 4/15 = (пж)