Решите . 1) 3 1/15 + 2 7/25. 2)2 7\10 + 9 2\15 найдите разность смешанных чисел. 1)12 5\9 - 7 1\6 2) 7 1\4 - 3 7\15 зареннее .

1) 3 1/15 + 2 7/25.=46/15+57/25=230/75+171/75=401/25=16.04
2)2 7\10 + 9 2\15 =27/10+137/15=54/30+274/30=328/30=10 14/15

1)12 5\9 - 7 1\6 =113/9-43/6=226/18-129/18=97/18=5 7/18
2) 7 1\4 - 3 7\15=29/4-52/15=435/60-208/60=227/60=2 47/60

1)
3 1/15 + 2 7/25 = (3 + 2) + (1/15 + 7/25) =
= 5 + (5/75 + 21/75) = 5 + 26/75 = 5 26/75,

2)
2 7/10 + 9 2/15 = (2 + 9) + (7/10 + 9/15) = 11 + (21/30 + 18/30) = 11 + 39/30 = 11 + 1 9/30 = 12 9/30 = 12 3/10,

1)
12 5/9 - 7 1/6 = (12 - 7) + (5/9 - 1/6) = 5 + (10/18 - 3/18) = 5 + 7/18 = 5 7/18,

2)
7 1/4 - 3 7/15 = (7 - 3) + (1/4 - 7/15) =
= 4 + (15/60 - 28/60) = 4 - 13/60 = 3 47/60