Тихон8 лет назад
Расставим действия:
1 4 2 5 3
9 1/4 * 8 - 1 2/3 * 5 1/2 - 2 4/5 * 2 11/12 = 74 - 11 - 49/6 = 63 - 49/6 = 329/6 = 54 5/6.
1) 9 1/4 * 8 = (4 * 9 + 1 / 4) * 8 = 37/4 * 8 = 296/4 = 74;
2) 1 2/3 * 5 1/2 = (3 * 1 + 2 / 3) * (2 * 5 + 1 / 2) = 5/3 * 11/2 = 55/5 = 11;
3) 2 4/5 * 2 11/12 = (5 * 2 + 4 / 5) * (12 * 2 + 11 / 12) = 14/5 * 35/12 = 49/6;
4) 74 - 11 = 63;
5) 63 - 49/6 = 378/6 - 49/6 = 329/6 = 54 5/6.