Question

Даю 100 баллов.Выполнить
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Answer 1

Ответ:

Пошаговое объяснение:

N 1

1) 2/15 - 3. 5/6 = 4/30 -

3. 25/30 = -3. 21/30 =

-3. 7/10

2) 2. 1/2 * (-3. 7/10) =

5/2 * (-37/10) = 1/2 * (-37/2) = -37/4 = -9. 1/4

3) -9. 1/4 + 1/4 = -9

Ответ: -9

N 2

1) 4/5 + 19/20 = 16/20 + 19/20 = 35/20 = 7/4 = 1. 3/4

2) 6. 5/6 + 4. 2/3 =

6. 5/6 + 4. 4/6 = 10. 9/6 =

11. 3/6 = 11. 1/2

3) -1. 1/7 * 1. 3/4 = -8/7 * 7/4 = -8/4 = -2

4) -2 * 11. 1/2 = -2 * 23/2 =

-1 * 23/1 = -23/1 = -23

Ответ: -23

N 3

1) 6. 3/8 - 2. 3/4 = 6. 3/8 -

2. 6/8 = 5. 11/8 - 2. 6/8 =

3. 5/8

2) 3. 5/8 * (-4) = 29/8 * (-4) = 29/2 * (-1) = -29/2 =

-14. 1/2

3) 7/18 * 9 = 7/2 * 1 = 7/2 = 3. 1/2

4) -14. 1/2 + 3. 1/2 = -11

Ответ: -11

N 4

1) 4. 1/3 - 8 = 4. 1/3 - 7. 3/3 = -3. 2/3

2) 9. 1/6 : (-3. 2/3) =

55/6 : (-11/3) = 55/6 * (-3/11) = 5/2 * (-1/1) = -5/2 = -2. 1/2

3) 24 * 3/8 = 3 * 3/1 = 9/1 = 9

4) -2. 1/2 + 9 = -2. 1/2 +

8. 2/2 = 6. 1/2

Ответ: 6. 1/2