1) ( 1 целых 3/5 +1,8)*1/2 2) (6 -4 целых 8/15):2,2 3) (1,25 +1/6)*2,4

Question

1) ( 1 целых 3/5 +1,8)*1/2
2) (6 -4 целых 8/15):2,2
3) (1,25 +1/6)*2,4

Answer 1

1) (1 целая 3/5 + 1,8) * 1/2 = 1,7
1 целая 3/5 + 1,8 = 8/5 + 18/10 = 8/5 + 9/5 = 17/5
17/5 * 1/2 = 17/10 = 1,7

2) (6 - 4 целых 8/15) : 2,2 = 2/3
6 - 4 цел 8/15 = 5 цел 15/15 - 4 цел 8/15 = 1 целая 7/15
1 цел 7/15 : 2,2 = 22/15 : 22/10 = 22/15 * 10/22 = 10/15 = 2/3

3) (1,25 + 1/6) * 2,4 = 3,4
1,25 + 1/6 = 1 цел 1/4 + 1/6 = 1 цел 3/12 + 2/12 = 1 цел 5/12
1 цел 5/12 * 2,4 = 17/12 * 24/10 = (17*2)/(1*10) = 34/10 = 3,4