Привести дроби к наименьшему общему знаменателю : 11/35 и 7/45, 7/10 и 5/14 , 3/20 и 1/16, 2/15 и 4/27, 5/42 и 3/56, 29/60 и 109/126 , 139/270 и 71/450 ,17/104 и 59/338
1) 11/35 = 99/315 и 7/45 = 49/315 2) 7/10 = 49/70 и 5/14 = 25/70 3) 3/20 = 12/80 и 1/16 = 5/80 4) 2/15 = 18/135 и 4/27 = 20/135 5) 5/42 = 20 /168 и 3/56 = 60/168 6) 29/60 = 609/1260 и 109/126 = 1090/1260 Решение 2 * 2 * 3 * 5 = 60 2 * 3 * 3 * 7 = 126 получаем 2 * 2 * 3 * 5 * 3 * 7= 60 * 21 = 1260 общий знаменатель 29/60 = (29*21)/(60*21) = 609/1260 109/126 = (109 * 10)/(126 * 10) = 1090/1260 7) 139/270 = 695/1350 и 71/450 = 213/1350