1) Вычислите: 13/21 - 11/28 + 8/33

Question

Вопрос:

Ответ:

Accepted Answer

13/21 - 11/28 + 8/33 = (13*4 - 11*3)/84 + 8/33 = (52 - 33)/84 + 8/33 = 19/84 + 8/33 = (19*11 + 8*28)/924 = (209 + 224)/924 = 433/924