Пошаговое объяснение:
1) 6 - 2 4/5 = 5 5/5 - 2 4/5 = 3 1/5
2) 3 1/5 - 1 1/9 = 3 9/45 - 1 5/45 = 2 4/45
3) 27/39 * 2 4/45 = 9/13 * 94/45 = 1/13 * 94/5 = 94/65 = 1 29/65
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Пошаговое объяснение:
1) 6 - 2 4/5 = 5 5/5 - 2 4/5 = 3 1/5
2) 3 1/5 - 1 1/9 = 3 9/45 - 1 5/45 = 2 4/45
3) 27/39 * 2 4/45 = 9/13 * 94/45 = 1/13 * 94/5 = 94/65 = 1 29/65