Question

7) 18 5/12-7/12×1 19/21-17/72×2/3=?
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Answer 1

Ответ:

17 4/27

Пошаговое объяснение:

1) 7/12 * 1 19/21 = 7/12 * 40/21 = 1/3 * 10/3 = 10/9 = 1 1/9

2) 17/72 * 2/3 = 17/36 * 1/3 = 17/108

3) 18 5/12 - 1 1/9 = 18 15/36 - 1 4/36 = 17 11/36

4) 17 11/36 - 17/108 = 17 33/108 - 17/108 = 17 16/108 = 17 4/27

Answer 2

Ответ:

Пошаговое объяснение:

18 5/12 - 7/12 * 1 19/21 - 17/72 * 2/3 = 17 4/27

1) 7/12 * 1 19/21 = 7/12 * 40/21 = 280/252 = 1 1/9

2) 17/72 * 2/3 = 34/216 = 17/108

3) 18 5/12 - 1 1/9 = 18 15/36 - 1 4/36 = 17 11/36

4) 17 11/36 - 17/108 = 17 33/108 - 17/108 = 17 16/108 = 17 4/27