Выполните действие: а) 3 1/3 + 1 б) 3 1/6 + 1/3 в) 4 3/5 + 2 г) 7 3/4 + 1/4 д) 12 + 2 7/10 е) 4 3/7 + 3/7 Задача 2 Выполните действие: а) 3 4/5 + 1 4/5 б) 1 4/9 в) 8 4/5 + 2 1/3 г) 12 5/6 + 4/15 д) 7/20 + 2 7/10 е) 8 3/7 + 1 9/14

а) 3 1/3 + 1 = 10/3 + 3/3 = 13/3;

б) 3 1/6 + 1/3 = (3 * 6 + 1) / 6 + 2/6 = 19/6 + 2/6 = 21/6;

в) 4 3/5 + 2 = (4 * 5 + 3) / 5 + 2 * 5/5 = 23/5 + 10/5 = 33/5;

г) 7 3/4 + 1/4 = (7 * 4 + 3) / 4 + 1/4 = 31/4 + 1/4 = 32/4 = 8;

д) 12 + 2 7/10 = 120/10 + 27/10 = 147/10;

е) 4 3/7 + 3/7 = (4 * 7 + 3) / 7 + 3/7 = 31/7 + 3/7 = 34/7;

а) 3 4/5 + 1 4/5 = (3 * 5 + 4) / 5 + (1 * 5 + 4) / 5 = 19/5 + 9/5 = 28/5;

б) 1 4/9 = 13/9;

в) 8 4/5 + 2 1/3 = 3 * (8 * 5 + 4) / 15 + 5 * (2 * 3 + 1) / 15 = 3 * 44/15 + 5 * 7/15 = 132/15 + 35/15 = 167/15;

г) 12 5/6 + 4/15 = (12 * 6 + 5) / 6 + 4/15 = 5 * 77/30 + 2 * 4/30 = (385 + 8) / 30 = 131/10;

д) 7/20 + 2 7/10 = 7/20 + 54/20 = 61/20;

е) 8 3/7 + 1 9/14 = 2 * 59/14 + 23/14 = 141/14.