Вычислите: 1) 7 14/15 (дробь)+2 1/15 2) 1-12/19 3) 12-11 6/11 4) 13 4/9-2 8/9 5) 29 49/53-8 49/53

1) 7 14/15 + 2 1/15 = (7 * 15 + 14)/15 + (2 * 15 + 1)/15 = (105 + 14)/15 + (30 + 1)/15 = 119/15 + 31/15 = (119 + 31)/15 = 150/15 = 10;

2) 1 - 12/19 = 19/19 - 12/19 = (19 - 12)/19 = 7/19;

3) 12 - 11 6/11 = 12 - (11 * 11 + 6)/11 = 12 - (121 + 6)/11 = 132/11 - 127/11 = (132 - 127)/11 = 5/11;

4) 13 4/9 - 2 8/9 = (13 * 9 + 4)/9 - (2 * 9 + 8)/9 = (117 + 4)/9 - (18 + 8)/9 = 121/9 - 26/9 = (121 - 26)/9 = 95/9;

5) 29 49/53 - 8 49/53 = (29 * 53 + 49)/53 - (8 * 53 + 49)/53 = 1586/53 - 473/53 = (1586 - 473)/53 = 1113/53 = 21.