7 3/8-5=45-44 3/8=6 7/15-31/5=10 3/23-7 19/46=

Question

Никита Малинин

Математика

21 июня, 17:45

7 3/8-5=45-44 3/8=6 7/15-31/5=10 3/23-7 19/46=

+3

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Варвара Соболева · Answer 1

1) 7 3/8 - 5 = 7 - 5 + 3/8 = 2 + 3/8 = 2 3/8;

2) 45 - 44 3/8 = 44 + 1 - 44 - 3/8 = 1 - 3/8 = 8/8 - 3/8 = (8 - 3) / 8 = 5/8;

3) 6 7/15 - 31/5 = 6 7/15 - 6 (31 - 6 * 5) / 5 = 6 7/15 - 6 (31 - 30) / 5 = 6 7/15 - 6 1/5 = 6 - 6 + 7/15 - 1/5 = 7/15 - 1/5 = 7/15 - (1 * 3) / (5 * 3) = 7/15 - 3/15 = (7 - 3) / 15 = 4/15;

4) 10 3/23 - 7 19/46 = 10 - 7 + 3/23 - 19/46 = 3 + (3 * 2) / (23 * 2) - 19/46 = 3 + 6/46 - 19/46 = 3 + (6 - 19) / 46 = 3 - 13/46 = 2 + 1 - 13/46 = 2 + 46/46 - 13/46 = 2 + (46 - 13) / 46 = 2 + 33/46 = 2 33/46.