Odpowiedź:
a)
11/7 - 5/7 = 6/7
4/5 - 2/5 = 2/5
1 3/8 + 5/8 = 1 8/8 = 2
b)
2 3/4 - 1/4 - 1 3/4 = 2 3/4 - 2 = 3/4
1 - 5/7 + 12/7 = 1 + 7/7 = 2
9/6 + 3/6 - 2 = 12/6 - 2 = 2 - 2 = 0
Szczegółowe wyjaśnienie:
1 i 3/8 + 5/8 = 1 i 8/8 = 2
2 i 3/4 - 1/4 - 1 i 3/4 = 2 i 2/4 - 1 i 3/4 = 1 i 6/4 - 1 i 3/4 = 3/4
1 - 5/7 + 12/7 = 7/7 - 5/7 + 12/7 = 2/7 + 12/7 = 14/7 = 2
