Вычислим 8/9 × 3/4 - (5/6 - 1/4) по действиям:
1) 8/9 * 3/4 = 3/9 * 8/4 = 1/3 * 2 = 2/3;
2) 5/6 - 1/4 = 5 * 2/12 - 1 * 3/12 = 10/12 - 3/12 = 7/12;
3) 2/3 - 7/12 = 2 * 4/12 - 7/12 = 8/12 - 7/12 = 1/12.
Вычислим 8/9 × 3/4 - (5/6 - 1/4) по действиям:
1) 8/9 * 3/4 = 3/9 * 8/4 = 1/3 * 2 = 2/3;
2) 5/6 - 1/4 = 5 * 2/12 - 1 * 3/12 = 10/12 - 3/12 = 7/12;
3) 2/3 - 7/12 = 2 * 4/12 - 7/12 = 8/12 - 7/12 = 1/12.