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

Question

Математика

Леонт

29 июля, 09:07

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

+3

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Вильгельмина · 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