Odpowiedź:
- 2 1/7 + 1 1/2 = - 2 2/14 + 1 7/14 = - 1 16/14 + 1 7/14 = - 9/14
- 2 1/7 - (- 1 1/2) = - 2 1/7 + 1 1/2 = - 1 16/14 + 1 7/14 = - 9/14
- 2 1/7 + (- 1 1/2) = - 2 1/7 - 1 1/2 = - 2 2/14 - 1 7/14 = - 3 9/14
2 1/7 + (- 1 1/2) = 2 1/7 - 1 1/2 = 2 2/14 - 1 7/14 = 1 16/14 - 1 7/14 = 9/14
2 1/7 - (- 1 1/2) = 2 1/7 + 1 1/2 = 2 2/14 + 1 7/14 = 3 9/14