Выполните действия по действиям 1) (6 7/12-3 17/36)*2 1/2-4 1/3: 13/20

(6 7/12 - 3 17/36) * 2 1/2 - 4 1/3 : 13/20 = 1 целая 1/9

1) 6 7/12 - 3 17/36 = 6 21/36 - 3 17/36 = 3 4/36 = 3 1/9
2) 3 1/9 * 2 1/2 = 28/9 * 5/2 = (14*5)/(9*1) = 70/9 = 7 7/9
3) 4 1/3 : 13/20 = 13/3 * 20/13 = 20/3 = 6 2/3
4) 7 7/9 - 6 2/3 = 7 7/9 - 6 6/9 = 1 1/9