184 страница номер 629 найдите значения выражений

629 номер 6 класс.

Вычислим выражения:

1) (3 1/3 + 2,5) * (4,6 - 2 1/3) = (3 1/3 + 2 ½) * (4 3/5 - 2 1/3) = (5 + 1/3 + ½) * (2 + 3/5 - 1/3) = (5 + (1 * 2 + 1 * 3) / 6) * (2 + (3 * 3 - 1 * 5) / 15) = (5 + 5/6) * (2 + 4/15) = 35/6 * 34/15 = 7/3 * 17/3 = 119/9 = 13 2/9;

2) (4,5 * 1 2/3 - 6,75) * (1 1/3) ^3 = (9/2 * 5/3 - 6 ¾) * (4/3) ^3 = (45/6 - 27/4) * (64/27) = (45 * 2 - 27 * 3) / 12 * 64/27 = 9/12 * 64/27 = ¾ * 64/27 = 3/27 * 64/4 = 1/9 * 32/2 = 1/9 * 16 = 16/9 = 1 7/9.