Вычислите 11 1/63 * 7 - 13 1/45 *5

Question

Вычислите 11 1/63 * 7 - 13 1/45 *5

Answer 1

Решение во вложении..............

Answer 2

11 1/63 * 7 - 13 1/45 *5 = 12

1) 11 1/63 * 7 =  (11*7)+(1/63*7) = 77 7/63 = 77 1/9
2) 13 1/45 * 5 = (13*5)+(1/45*5) = 65 5/45 = 65 1/9
3)  77 1/9 - 65 1/9 - (77-65)+(1/9-1/9) = 12