Question

вычислите: (3 1/4+0,25-1 5/24)×(2 3/4-4 1/2-0,75):(-4 7/12)

Answer 1

(3 1/4 + 0,25 - 1 5/24) : (2 3/4 - 4 1/2 - 0,75) : (- 4 7/12) = 1/5

1. 3 1/4 + 0,25 = 3 1/4 + 1/4 = 3 2/4 = 3 1/2

2. 3 1/2 - 1 5/24 = 3 12/24 - 1 5/24 = 2 7/24

3. 2 3/4 - 4 1/2 = 2,75 - 4,5 = - 1,75

4. - 1,75 - 0,75 = - 2,5 = - 2 1/2

5. 2 7/24 : (- 2 1/2) = 55/24 : (- 5/2) = - 55/24 * 2/5 = - 11/12

6. (- 11/12) : (- 4 7/12) = 11/12 : 55/12 = 11/12 * 12/55 = 11/55 = 1/5