Найди значения выражений 5 класс

3 17/20 : (3 2/5 + 1 11/15) = 3 17/20 : (3 6/15 + 1 11/15)  3 17/20 : 5 2/15 = 77/20 * 15/77 = 4/3 = 1 1/3

(1 7/10 + 4/5) : 1 7/8 = (1 7/10 + 8/10) : 1 7/8 = 2 1/2 : 1 7/8 = 5/2 * 8/15 = 40/30 = 4/3 = 1 1/3

1 9/35 : (1 1/5 + 2/3) = 1 9/35 : (1 3/15 + 10/15) = 1 9/35 : 1 13/15 = 44/35 * 15/28 = 660/980 = 66/98 = 33/49