Question

при деление числа c на 7 получилось 5 целый 6/7

Answer 1

С:7=5 6/7; с=(5 6/7)*7; с=41/7*7; с =41/7*7; с=41/7*49/7; с=2009/49; с=41. Проверка 41:7=41*41/41:7*7/7=1681/41:49/7=1681/41*7/49=11767/2009=41/7=5 6/7.