Question

вычислите - 8/13:4       4:8/13         4/5:3       3:4/5        15/7:5     5:15/7       21/16;7       7:21/16

Answer 1

8/13:4 = 8/13 * 1/4 = 2/13 * 1/1 = 2/13
4:8/13 = 4/1 * 13/8 = 1/1 * 13/2 = 13/2 = 6,5
4/5:3 = 4/5 * 1/3 = 4/15
3:4/5 = 3/1 * 5/4 = 15/4 = 3,75
15/7:5 = 15/7 * 1/5 = 3/7 * 1/1 = 3/7
5:15/7 = 5/1 * 7/15 = 1/1 * 7/3 = 7/3 = 2 1/3
21/16;7 = 21/16 * 1/7 = 3/16 * 1/1 = 3/16
7:21/16 = 7/1 * 16/21 = 1/1 * 16/3 = 16/3 = 5 1/3

Answer 2

Давайте посчитаем эти выражения по порядку:

1. -8/13 : 4 = -2/13

2. 4 : 8/13 = 4 * 13/8 = 52/8 = 13/2

3. 4/5 : 3 = 4/5 * 1/3 = 4/15

4. 3 : 4/5 = 3 * 5/4 = 15/4

5. 15/7 : 5 = 15/7 * 1/5 = 3/7

6. 5 : 15/7 = 5 * 7/15 = 7/3

7. 21/16 : 7 = 21/16 * 1/7 = 3/16

8. 7 : 21/16 = 7 * 16/21 = 112/21 = 16/3

Итак, результаты вычислений:

-8/13 : 4 = -2/13 4 : 8/13 = 13/2 4/5 : 3 = 4/15 3 : 4/5 = 15/4 15/7 : 5 = 3/7 5 : 15/7 = 7/3 21/16 : 7 = 3/16 7 : 21/16 = 16/3