655. Вычислите:5524527 52-573:11)3)81098002) 2-37-(2-111) 21:541282- +6 152 21-2

:

1.

1) 4. 2/3 - 2. 5/8 = 4. 16/24 - 2. 15/24 = 2. 1/24

2) 1. 5/7 * 2. 1/24 = 12/7 * 49/24 = 1/1 * 7/2 = 7/2

3) 7/2 : 1. 3/4 = 7/2 : 7/4 = 7/2 * 4/7 = 4/2 = 2

4) 5/9 + 2 = 2. 5/9

2.

1) 2 - 1. 9/11 = 1. 11/11 - 1. 9/11 = 2/11

2) 3. 1/7 * 2/11 = 22/7 * 2/11 = 2/7 * 2/1 = 4/7

3) 4/7 : 8/21 = 4/7 * 21/8 = 1/1 * 3/2 = 3/2 = 1. 1/2

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

3.

1) 2. 7/15 - 5/12 = 2. 28/60 - 25/60 = 2. 3/60 = 2. 1/20

2) 4. 1/10 : 2. 1/20 = 41/10 : 41/20 = 41/10 * 20/41 = 20/10 = 2

3) 2 * 5/6 = 10/6 = 5/3 =

1. 2/3

4) 2. 1/3 + 1. 2/3 = 3. 3/3 = 4

4.

1) 2. 1/6 + 8/15 = 2. 5/30 + 16/30 = 2. 21/30 = 2. 7/10

2) 1. 1/2 : 2. 7/10 = 3/2 : 27/10 = 3/2 * 10/27 = 1/1 * 5/9 = 5/9

3) 5/9 * 1. 4/5 = 5/9 * 9/5 = 1/1 * 1/1 = 1

4) 4. 5/12 - 1 = 3. 5/12