1 + 2 2 + 3 3 + 4 4 + 5
1 + 2
2 + 3
3 + 4
4 + 5
1+2=3
2+3=5
3+4=7
4+5=9
1 + 2 = 3
2 + 3 = 5
3 + 4 = 7
4 + 5 = 9
This question is very easy.