Вычеслите:4) 4 5/12 - 1 1/2÷(2 1/6+8/15)× 1 4/5.Помогите пожалуйста.Сроочно.Спасибо
4 5/12-1 1/2:(2 1/6 + 8/15)* 1 4/5=53/12 - 3/2:(13/6 + 8/15)* 9/5 = 53/12 - 3/2:(65/30 + 16/30)*9/5 = 53/12 - 3/2:81/30*9/5 = = 53/12 - 3/2:81/30*9/5 =53/12 - 3/2*30/81*9/5 = 53/12 - 1 = 53/12 - 12/12 = 41/12 = = 3 5/12