Question

ПОЖАЛУЙСТА ТУТ НЕ ОЧЕНЬ СЛОЖНО

Answer 1

Ответ:

Пошаговое объяснение:

№3

1) 5/7 * (-1,4) = 5/7 * (-1. 4/10) =

5/7 * (-14/10) = 1/1 * (-2/2) = -2/2 = -1

2) 5. 1/5 + (-1) = 5. 1/5 - 1 = 4. 1/5

3) -5,25 : 4. 1/5 = -5. 25/1 00 : 4. 1/5 = -5. 1/4 : 4. 1/5 = -21/4 : 21/5 = -21/4 * 5/21 = -5/4 = -1. 1/4

4) -1. 1/4 - 3. 19/20 = -1. 5/20 - 3. 19/20 = -4. 24/20 = -5. 4/20 = -5. 1/5 или -5,2

№4

1) 2. 3/7 - 3,4 = 2. 3/7 - 3. 4/10 = 2. 30/70 - 3. 28/70 = 2. 30/70 - 2. 98/70 = -68/70 = -34/35

2) 2. 3/7 + 3,4 = 2. 3/7 + 3. 4/10 = 2. 30/70 + 3. 28/70 = 5. 58/70 = 5. 29/35

3) -34/35 : 5. 29/35 = -34/35 : 204/35 = -34/35 * 35/204 = -34/204 = -1/6

Это числитель

4) 4,2 + 1. 10/11 = 4. 2/10 + 1. 10/11 = 4. 1/5 + 1. 10/11 = 4. 11/55 + 1. 50/55 = 5. 61/55 = 6. 6/55

5) 4,2 - 1. 10/11 = 4. 2/10 - 1. 10/11 = 4. 1/5 - 1. 10/11 = 4. 11/55 - 1. 50/55 = 3. 66/55 - 1. 50/55 = 2. 16/55

6) 6. 6/55 : 2. 16/55 = 336/55 : 126/55 = 336/55 * 55/126 = 336/126 = 2. 84/126 = 2. 2/3

Это знаменатель

7) -1/6 : 2. 2/3 = -1/6 : 8/3 = -1/6 * 3/8 =

-3/48 = -1/16