1/4 * 3 2 * 7/15 7/18 * 2 7*1/8 1/9 * 2 2*13/20 1/30*3 3*7/24

Найдем значения выражения:

1) 1/4 * 3 = 3/4 = 0,75;

2) 2 * 7/15 = (2 * 7) / 15 = 14/15;

3) 7/18 * 2 = (7 * 2) / 18 = (7 * 2) / (2 * 9) = (7 * 1) / (1 * 9) = 7/9;

4) 7 * 1/8 = 7/8;

5) 1/9 * 2 = 2/9;

6) 2 * 13/20 = (2 * 13) / 20 = (2 * 13) / (2 * 10) = (1 * 13) / (1 * 10) = 13/10 = 1 3/10;

7) 1/30 * 3 = 3/30 = 3 / (3 * 10) = 1 / (1 * 10) = 1/10;

8) 3 * 7/24 = (3 * 7) / 24 = (3 * 7) / (3 * 8) = (1 * 7) / (1 * 8) = 7/8.