1 + 9 = ?
10
2 + 18 = ?
20
3 + 27 = ?
30
4 + 36 = ?
40
5 + 45 = ?
50
2 + 8 = ?
4 + 16 = ?
30 + 0 = ?
0 + 40 = ?
50 + 12 - 12 = ?
also that's a big equation