Question

(2.1/4+3.2/4) /(8.1/2-1.2/5) *3.3/5​

Answer 1

Ответ:

2. 65/71

Пошаговое объяснение:

1) 2. 1/4 + 3. 2/4 = 5. 3/4

2) 8. 1/2 - 1. 2/5 = 8. 5/10 -

1. 4/10 = 7. 1/10

3) 5. 3/4 : 7. 1/10 =

23/4 : 71/10 = 23/4 * 10/71 = 23/2 * 5/71 = 115/142

4) 115/142 * 3. 3/5 =

115/142 * 18/5 = 23/71 * 9/1 = 207/71 = 2. 65/71

Answer 2

Решение:

(2.1/4+3.2/4)=(0.525+0.8)=1.325

(8.1/2-1.2/5)=(4.05-0.24)=3.81

1.325/3.81*3.3/5=1.325/3.81*0.66=583/2540(дробью)или ≈0.229528

Ответ:

583/2540 или ≈0.229528