(9-2целых2/15*5целых1/8)*9/14

1) 2 2/15 * 5 1/8 = 32/15 * 41/8 = 164/15 = 10 14/152) 9 - 10 14/15 = 9 - 164/15 = =(9*15 - 164*1)/15 = (135 - 164)/15 = - 29/15 = - 1 14/153) (- 1 14/15) * 9/14 = ( - 29/15) * 9/14 = - 87/70 = - 1 17/70ответ - 1 17/70