1) 7/9-47/72 = 56/72 - 47/72 = 8/72 = 1/82) 1/8 : 1,25 = 1/103) 1/10 + 7/40 = 4/40 + 7/40 = 11/404) 0,358-0,108 = 0,25 = 1/45) 11/40 : 1/4 = 44/40 = 11/106) 11/10 * 1,6 = 176/1007) 176/100 - 19/25 = 176/100 - 19*4/100 = (176 - 76)/100 = 100/100 = 1.Ответ: 1.Первый а 2,3,4 незнаю