Verified answer

3) (4,25 * 16/51 - 17/18 : 8,5) * (3/11)^2 = 1/11

1) 4,25 * 16 : 51 = 68 : 51 = 68/51 = 4/3

2) 17/18 : 8,5 = 17/18 : 85/10 = 17/18 * 10/85 = (1*5)/(9*5) = 1/9

3) 4/3 - 1/9 = 12/9 - 1/9 = 11/9

4) (3/11)^2 = 3/11 * 3/11 = 9/121

5) 11/9 * 9/121 = 11/121 = 1/11

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4) (- 12,6 * 1 1/9 + 10,8) : 6 6/7 + 2 3/10 = 1 целая 5/6

1) - 12,6 * 1 1/9 = -126/10 * 10/9 = -126/9 = - 14

2) - 14 + 10,8 = - 3,2

3) - 3,2 : 6 6/7 = - 32/10 : 48/7 = - 32/10 * 7/48 = - (2*7)/(10*3) = - 14/30

4) - 14/30 + 2 3/10 = 2 9/30 - 14/30 = 1 39/30 - 14/30 = 1 25/30 = 1 5/6

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5) (1 - 7/15 + 0,4) : (0,3 + 3/19 - 15/38) = 5 целых 13/24

1) 1 - 7/15 = 15/15 - 7/15 = 8/15

2) 8/15 + 0,4 = 8/15 + 4/10 = 16/30 + 12/30 = 28/30 = 14/15

3) 0,3 + 3/19 = 3/10 + 3/19 = 57/190 + 30/190 = 87/190

4) 87/190 - 15/38 = 87/190 - 75/190 = 12/190 = 6/95

5) 14/15 : 6/95 = 14/15 * 95/16 = (7*19)/(3*8) = 133/24 = 5 целых 13/24