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
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
583/2540 или ≈0.229528
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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
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