Приведите дроби к общему знаменателю и найдите разность 5/6 и 2/3,5/6 и7/12, 11/15 и 2/3,40/60 и 9/15,2/3 и 1/8,17/42 и 6/21,2/8 и 4/24,23/45 и 4/15

Question

Gudzhur

Математика

8 марта, 09:26

Приведите дроби к общему знаменателю и найдите разность 5/6 и 2/3,5/6 и7/12, 11/15 и 2/3,40/60 и 9/15,2/3 и 1/8,17/42 и 6/21,2/8 и 4/24,23/45 и 4/15

+2

Ответы (1)

Знаешь ответ на этот вопрос?

Георгий Богданов · Answer 1

1) 5/6 - 2/3 = 5/6 - 2 * 2/6 = 5/6 - 4/6 = (5 - 4) / 6 = 1/6;

2) 5/6 - 7/12 = 2 * 5/12 - 7/12 = 10/12 - 7/12 = (10 - 7) / 12 = 3/12 = 1/4;

3) 11/15 - 2/3 = 11/15 - 2 * 5/15 = 11/15 - 10/15 = (11 - 10) / 15 = 1/15;

4) 40/60 - 9/15 = 40/60 - 4 * 9/60 = 40/60 - 36/60 = (40 - 36) / 60 = 4/60 = 1/15;

5) 2/3 - 1/8 = 8 * 2/24 - 3/24 = 16/24 - 3/24 = (16 - 3) / 24 = 13/24;

6) 17/42 - 6/21 = 17/42 - 2 * 6/42 = 17/42 - 12/42 = (17 - 12) / 42 = 5/42;

7) 2/8 - 4/24 = 3 * 2/24 - 4/24 = 6/24 - 4/24 = (6 - 4) / 24 = 2/24 = 1/12;

8) 23/45 - 4/15 = 23/45 - 3 * 4/45 = (23 - 12) / 45 = 11/45.