Ответ:

Пошаговое объяснение:

1) 2 4/5 + 2 2/3 = 2 12/15 + 2 10/15 = 4 22/15 = 5 7/15

2) 10 13/30 - 3,6 = 10 13/30 - 3 6/10 = 10 13/30 - 3 18/30 = 6 25/30 = 6 5/6

3) 5 7/15 : 6 5/6 = 82/15 * 6/41 = 4/5

4) 4/5 * 1,25 = 0,8 * 1,25 = 1

ответ: 1

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1) 15,25 - 2,5 = 12,75

2) -3 5/12 + 2 2/9 = -3 15/36 + 2 8/36 = -1 7/36

3) 12,75 - 1 7/36 = 12 3/4 - 1 7/36 = 12 27/36 - 1 7/36 = 11 20/36 = 11 5/9

4) 6 1/15 - 4 1/3 = 6 1/15 - 4 5/15 = 1 11/15

5) 11 5/9 : 1 11/15 = 104/9 * 15/26 = 20/3 = 6 2/3

ответ: 6 2/3