1) 3 - (20/27+14/27) = 2) 5 - (19/22-9/22) = 3) 4 - (17/25+11/25) 4) 8 - (39/40-14/40

Question

Лея Иванова

Математика

7 мая, 04:17

1) 3 - (20/27+14/27) = 2) 5 - (19/22-9/22) = 3) 4 - (17/25+11/25) 4) 8 - (39/40-14/40

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Голубушка · Answer 1

1) 3 - (20/27 + 14/27) = 3 - 34/27 = (3 * 27 - 34) / 27 = 47/27 = 1 20/27;

2) 5 - (19/22 - 9/22) = 5 - 10/22 = (5 * 22 - 10) / 22 = 100/22 = 50/11 = 4 6/11;

3) 4 - (17/25 + 11/25) = 4 - 28/25 = (4 * 25 - 28) / 25 = 72/25 = 2 22/25;

4) 8 - (39/40 - 14/40) = 8 - 25/40 = 8 - 5/8 = (8 * 8 - 5) / 8 = 59/8 = 7 3/8.