Решите 4 2/5 - 3/5; 5 7/10 - 9/10; 24 1/8 - 12 7/8; 2 14/25 - 1 24/25; 4 5/12 - 1 5/12; 8 9/13-4 10/13

Question

Мирон Соколов

Математика

3 мая, 19:42

Решите 4 2/5 - 3/5; 5 7/10 - 9/10; 24 1/8 - 12 7/8; 2 14/25 - 1 24/25; 4 5/12 - 1 5/12; 8 9/13-4 10/13

+4

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Платон Воронин · Answer 1

1) 4 2/5 - 3/5 = (4 * 5 + 2) / 5 - 3/5 = 22/5 - 3/5 = (22 - 3) / 5 = 19/5 = 3 4/5,

2) 5 7/10 - 9/10 = (5 * 10 + 7) / 10 - 9/10 = 57/10 - 9/10 = (57 - 9) / 10 = 48/10 = 4 8/10,

3) 24 1/8 - 12 7/8 = (24 * 8 - 1) / 8 - (12 * 8 + 7) / 8 = 193/8 - 103/8 = (193 - 103) / 8 = 90/8 =

8 2/8 = 8 1/4,

4) 2 14/25 - 1 24/25 = (2 * 25 + 14) / 25 - (1 * 25 + 24) / 25 = 64/25 - 49/25 = (64 - 49) / 25 =

15/25 = 3/5,

5) 4 5/12 - 1 5/12 = (4 * 12 + 5) / 12 - (1 * 12 + 5) / 12 = 53/12 - 17/12 = (53 - 17) / 12 =

36/12 = 3,

6) 8 9/13 - 4 10/13 = (8 * 13 + 9) / 13 - (4 * 13 + 10) / 13 = 113/13 - 62/13 = (113 - 62) / 13 =

51/13 = 3 12/13.