7 целых 4/15+(3 целых 1/6-3 целых4/2)
3 1/6 - 3 4/2 = 19/6-10/2=19/6 - 5/1 =(19 × 1 - 5 × 6)/6 = 19/6 - 30/6 = - 11/6 = - 1 5/6 7 4/15+(-1 5/6) =7 4/15 - 1 5/6 = 109/15 - 11/6 = (109 × 2 - 11 × 5)/30 = 218/30 - 55/30 = 163/30 = 5 13/30 ответ 5 13/30
7целых 4\15+(3целых1\6 -3целых4\2)=3 целых 1\6 - 3 целых 4\2 = 3\4 + 7 целых 4\15=7 целых 7\19