Помогите пожалуйста !!! 1) 1 7/15 - 4/25 2) 6 3/4 * 1 7/9 3) (48/45 - 1/3) * 2 3/11 + 3/5

1) 1 7/15 - 4/25 = 22/15 - 4/25 = (22*10 - 4*6)/150 = 196/150 = 98/75 = 1 23/75 ;2) 6 3/4 * 1 7/9 = 27/4 * 16/9 = 12.3) (48/45 - 1/3) * 2 3/11 + 3/5 = (16/15 - 1/3) * 2 3/11 + 3/5 = (16*1 - 5*1)/15 * 25/11 + 3/5 = 11/15 * 25/11 + 3/5 = 5/3 + 3/5 = (5*3 +3*5)/15 = 30/15 = 2.