Verified answer

Пошаговое объяснение:

№3

1) 5. 1/3 * 1,25 = 5. 1/3 * 1. 25/100 = 16/3 * 125/100 = 4/3 * 125/25 = 4/3 * 5 = 20/3 =

6. 2/3

2) 5. 5/28 - 6. 2/3 = 5. 15/84 - 6. 56/84 =

-1. 41/84

3) -1. 41/84 - 1. 16/21 = -1. 41/84 - 1. 64/84 = -2. 105/84 = -3. 21/84 = -3. 3/12

4) -3. 3/12 : (-1,5) = -39/12 : (-15/10) = -39/12 * (-10/15) = -13/6 * (-5/5) = -13/6 * (-1) = 13/6 =

2. 1/6

Ответ: 2. 1/6

№4

1) -3. 1/3 * 1,9 = -10/3 * 19/10 = -19/3 =

-6. 1/3

2) 19,5 : 4. 1/3 = 195/10 : 13/3 = 195/10 * 3/13 = 15/10 * 3/1 = 45/10 = 4. 5/10 = 4. 1/2

3) -6. 1/3 + 4. 1/2 = -6. 2/6 + 4. 3/6 = -5. 8/6 + 4. 3/6 = -1. 5/6

4) 0,16 - 62/75 = 16/100 - 62/75 = 4/25 - 62/75 = 12/75 - 62/75 = -50/75 = -2/3

5) -1. 5/6 : (-2/3) = -11/6 * (-3/2) = -11/2 * (-1/2) = 11/4 = 2. 3/4 или 2,75

Ответ: 2. 3/4 или 2,75