1 пример:
1) - 1 2/3 - 2 1/3 = - 4
2) - 4 + 2,5 = -1,5
2 пример:
1) - 4 2/7 + 3 3/4 = - 4 8/28 + 3 21/28 = - 3 36/28 + 3 21/28 = - 15/28
2) - 15/28 - 1 1/2 = - 15/28 - 1 14/28 = - 1 29/28 = - 2 1/28
3 пример:
1) - 4 2/7 + 3 3/14 = - 4 4/14 + 3 3/14 = - 1 1/14
2) - 1 1/14 - 1 1/2 = - 1 1/14 - 1 7/14 = - 2 8/14 = - 2 4/7