Решить 6кл 1)(3,3-1,8)*3целых5/9 2)(2целых1/12-1целая3/4)*1,25 3)3целых5/18: 59/60=2,6

1)(3,3 - 1,8)*3 5/9
1,5 * 32/9 = 3/2 * 32/9 = 16/3 = 5 1/3
2)(2 1/12 - 1 3/4)*1,25
(25/12 - 7/4)*5/4 = (25-21)/12*5/4 = 1/3* 5/4 = 5/12
3)3 5/18 : 59/60 ? 2,6
59/18 * 60/59 + 13/5 = 60/18 + 13/5 = 10/3 + 13/5 = 89/15 = 5 14/15
59/18 * 60/59 - 13/5 = 60/18 - 13/5 = 10/3 - 13/5 = 11/15