сделайте деление 1/3:1/9, 3/8:1/2, 4/9:8/9. 1/12:1/6. 3/5:1/25. 2/7:3/7. 1/10:1/10. 3/4:5/8

Выполним дробление, заменив деление на умножение оборотной дроби:

1) 1/3 : 1/9 = 1/3 * 9/1 = 9/3 = (3 * 3)/3 = 3;

2) 3/8 : 1/2 = 3/8 * 2/1 = (3 * 2)/(4 * 2) = 3/4;

3) 4/9 : 8/9 = 4/9 * 9/8 = (4 * 9)/(9 * 4 * 2) = 1/2;

4) 1/12 : 1/6 = 1/12 * 6/1 = 6/12 = 6/(2 * 6) = 1/2;

5) 3/5 : 1/25 = 3/5 * 25/1 = (3 * 25)/5 = (3 * 5 * 5)/5 = 3 * 5 = 15;

6) 2/7 : 3/7 = 2/7 * 7/3 = (2 * 7)/(7 * 3) = 1/3;

7) 1/10 : 1/10 = 1/10 * 10/1 = 10/10 = 1;

8) 3/4 : 5/8 = 3/4 * 8/5 = (3 * 8)/(4 * 5) = (3 * 2 * 4)/(4 * 5) = (3 * 2)/5 = 6/5 = 1 1/5.