1+1=
2
10+10=
20
1x1=
1
2+2=
4
20+20=
40
2x1=
3+3=
6
30+30=
60
3x1=
3
4+4=
8
40+40=
80
4x1=
5+5=
10
50+50=
100
5x1=
5
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