Počítej příklady s nulou.

4 + 0 =	4 – 0 =	0 + 5 =	9 – 0 =
0 + 1 =	8 + 0 =	8 – 0 =	0 + 7 =
6 + 0 =	0 + 6 =	6 – 0 =	0 + 0 =
5 – 0 =	7 – 0 =	0 + 8 =	7 + 0 =