Question

СРОЧНО, ПОМОГИТЕ, ПОЖАЛУЙСТА. ПОДРОБНО.

Answer 1

Ответ:

3.

1) 3 1/4 + 2 1/6 = 3 3/12 + 2 2/12 = 5 5/12

2) 5 5/12 : 2 3/5 = 65/12 * 5/13 = 25/12

3) 2/3 : 4/9 = 2/3 * 9/4 = 3/2

4) 25/12 - 3/2 = 25/12 - 18/12 = 7/12

4.

1) 5.07 : 1/20 = 507/100 * 20/1 = 10140/100 = 101.4

2) 23.4 : 13/50 = 234/10 * 50/13 = 900/10 = 90

3) 101.4 - 90 = 11.4

4) 11.4 * 1/4 = 11.4 * 0.25 = 2.85

5) 0.074 * 1/2 = 0.074 * 0.5 = 0.037

6) 2.85 + 0.037 = 2.887

5.

1) -31.7 : 63.4 = -0.5

2) 23.4 : (-11.7) = -2

3) -0.5 - (-2) = -0.5 + 2 = 1.5

4) 1.5 * (-2.4) = -3.6

6.

1) 4.32 : (-1.8) = -2.4

2) -1.2+(-2.4) = -1.2 - 2.4 = -3.6

3) -3.6 : (-0.001) = 3600

4) 3600 * (-0.3) = -1080

7.

1) 7/16 - (- 5/24) = 7/16 + 5/24 = 21/48 + 10/48 = 31/48

2) 31/48 : (-1 15/16) = 31/48 * (- 16/31) = 1/3

8.

1) 10/21 - 25/28 = 280/588 - 525/588 = - 245/588

2) - 11/14 + 24/35 = - 55/70 + 48/70 = - 7/70

3) - 245/588 : (- 7/70) = 245/588 * 70/7 = 2450/588 = 4 49/294

9.

1) -4.8 : 4/15 = - 48/10 * 15/4 = -180/10 = -18

2) -15 3/7 + 18 = - 108/7 + 126/7 = 18/7

3) 2 1/3 * 18/7 = 7/3 * 18/7 = 6

4) -2 2/3 + 6 = 4 2/3