Вычислите: 3/8 * (-4) + 5; 5/9: (-1/3) - 7; 1/2 * (-4) - 5; 4/9: (-2/3) + 1; 2/5 * (-3) - 4/5; 5/12:1/4 - (-1/3)

Question

Safira

Математика

19 июня, 00:13

Вычислите: 3/8 * (-4) + 5; 5/9: (-1/3) - 7; 1/2 * (-4) - 5; 4/9: (-2/3) + 1; 2/5 * (-3) - 4/5; 5/12:1/4 - (-1/3)

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Лилия Нестерова · Answer 1

1. (3 * (-4)) / 8 + 5 = - 12/8 + 5 = - 3/2 + 10/2 = 7/2 = 3 1/2.

2. 5/9 * (-3) - 7 = - 15/9 - 7 = - 1 2/3 - 7 = - 8 2/3.

3. (1 * (-4)) / 2 - 5 = - 2 - 5 = - 7.

4. 4/9 * (-3/2) + 1 = - 2/3 + 3/3 = 1/3.

5. (2 * (-3)) / 5 - 4/5 = - 6/5 - 4/5 = - 10/5 = - 2.

6. 5/12 * 4 - (-1/3) = 5/3 + 1/3 = 6/3 = 2.