Выполните умножение: н) 2 14/15*6 6/11; надо! заранее ! )

2 14/15 * 6 6/11 = (2 * 15 + 14)/15 * (6 * 11 + 6)/11 = 44/15 * 72/11 = 4/5 * 24/1 = 96/5 = 19 1/5

ж) (2/7+3 1/4)-(11/14+13/28) = (8/28 + 3 7/28) - (22/28 + 13/28) = 3 15/28 - 35/28 = 3 15/28 - 1 7/28 = 2 8/28 = 2 2/7


з) (8 7/12-2 5/8)-( 3 7/12-1 1/3) = (8 14/24 - 2 15/24) - (3 14/24 - 1 8/24) = (7 38/24 - 2 15/24) - 2 6/24 = 5 23/24 - 2 6/24 = 3 17/24