1)3 5/12 + 4 7/12 = 41/12 + 55/12 = 96/12 = 8
2)8 + 5 2/9 = 8/1 + 47/9 =(8 × 9 + 47 × 1)/9 = 72 /9 + 47/9 =119/9 = 13 2/9
ОТВЕТ 13 2/9
1)7 11/15 + 2 8/15 = 116/15 + 38/15 = 116/15 + 38/15 =154/15 = 10 4/15
2)12 2/15 - 10 4/15 = 182/15 - 154/15 = 182/15 - 154/15 = 28/15 = 1 13/15
ОТВЕТ 1 13/15