Пожалуйсто))))))))))))))
1) 2 3/7 * 3/17 = 17/7 * 3/17 = 3/7 2) 6 4/5 - 5 2/5 = 1 2/5 3) 3/15 : 1 2/5 = 1/5 * 5/7 = 1/7 4)3/7 - 1/7 = 2/7 5) 4 4/5 : 1 1/2 = 24/5 * 2/3 = 16/5= 3 1/5 6) 3 1/5 - 3 = 1/5 7) 2/7 : 1/5 = 2/7 * 5/1 = 10/7 = 1 3/7 ответ: 1 3/7