Question

(4 целых 5/6 - 2,5)*12-27*5/9
(2целых 7/12+1,75):13+2,5:3целых 3/4

Answer 1

1.  (4ц 5/6 - 2,5) * 12 - 27 * 5/9 = 16,6

1)  (4ц5/6 - 2,5) = 29/6 - 11/5 = 79/30
2)  79/30* 12 = 158/5 = 31,6
3)  27 * 5/9 = 15
4) 31,6 -15 =16,6

2.  (2ц7/12 + 1,75) :13 + 2,5: 3ц3/4 = 1

1) (2ц7/12 = 1, 75) = 31/12 + 7/4 = 13/3
2)  13/3 : 13 = 1/3
3)  2,5 : 3ц3/4 = 5/2 : 15/4 = 2/3
4)1/3 + 2/3 = 1