А) 14/9 + 5/9 = 21/9 = 2 1/3 б) 11/3+2/3 = 13/3 = 4 1/3 в) общий знаменатель 240, меньше не могу подобрать(( 680+906/240 = 1586/240 = 793/120 г) 13/5 + 2/5 = 13+2/5 = 15/5 = 3/1 = 3 д) 34/5 + 8/5 = 34+8/5 = 42/5 = 8 2/5 е) 19/10 + 41/15 = 38+82/30 = 120/30 = 4 ж) 31/3 + 2/3 = 33/3 = 11 з) 38/7 + 41/7 = 79/7 = 11 2/7 и) 47/6 + 31/14 = 658+186 / 84 = 844/84 = 10 4/84 = 10 1/21