Вопрос по математике:

Выполните действие: 1)3/8*4/5*9/10 2)6/7:3/5*1 2/5 3)2 2/11*1 3/8:3/4 4)11/23*3 2/7:5 1/2 5)3/5*(2 2/3:3 1/5) 6)1 1/8*(9

1) 3/8 * 4/5 * 9/10 = 3 * 4 * 9 / 8 * 5 * 10 = 108/400 = 27/100 = 0,27;2) 6/7 : 3/5 * 1 2/5 = 6/7 * 5/3 * 7/5 = 6 * 5 * 7 / 7 * 3 * 5 = 210/105 = 2;3) 2 2/11 * 1 3/8 : 3/4 = 24/11 * 11/8 * 4/3 = 24 * 11 * 4 / 11 * 8 * 3 = 1056/264 = 4; 4) 11/23 * 3 2/7 : 5 1/2 =11/23 * 23/7 * 2/11 = 11/7 * 2/11 = 2/7;5) 3/5 * (2 2/3 : 3 1/5) = 3/5 * (8/3 : 16/5) = 3/5 * (8/3 * 5/16) = 3/5 * 40/48 = 120/240 = 1/2; 6) 1 1/8 * (9 1/3 : 1 3/4) = 9/8 * (28/3 : 7/4) = 9/8 * (28/3 * 4/7) = 9/8 * 112/21 = 9/8 * 16/3 == 144/24 = 6.