1+1
2
10+10
20
9x1
9
11+11
22
11X2
2+2
4
20+20
40
9x2
18
11+22
33
11X3
3+3
6
30+30
60
9x3
27
11+33
44
11X4
4+4
8
40+40
80
9x4
36
11+44
55
11x9
99
5+5
10
50+50
100
9x5
45
11+66
77
9x9
81