1*8+1=9
12*8+2=98
123*8+3=987
1,234*8+4=9,876
12,345*8+5=98,765
123,456*8+6=987,654
1,234,567*8+7=9,876,543
12,345,678*8+8=98,765,432
123,456,789*8+9=987,654,321

 

9*9+7=88
98*9+6=888
987*9+5=8,888
9,876*9+4=88,888
98,765*9+3=888,888
987,654*9+2=8,888,888
9,876,543*9+1=88,888,888
98,765,432*9+0=888,888,888
65,359,477,124,183*17*1=1,111,111,111,111,111
65,359,477,124,183*17*2=2,222,222,222,222,222
65,359,477,124,183*17*3=3,333,333,333,333,333
65,359,477,124,183*17*4=4,444,444,444,444,444
65,359,477,124,183*17*5=5,555,555,555,555,555
65,359,477,124,183*17*6=6,666,666,666,666,666
65,359,477,124,183*17*7=7,777,777,777,777,777
65,359,477,124,183*17*8=8,888,888,888,888,888
65,359,477,124,183*17*9=9,999,999,999,999,999

 

1*9-1=8
21*9-1=188
321*9-1=2,888
4,321*9-1=38,888
54,321*9-1=488,888
654,321*9-1=5,888,888
7,654,321*9-1=68,888,888
87,654,321*9-1=788,888,888
987,654,321*9-1=8,888,888,888

 

1*9+2=11
12*9+3=111
123*9+4=1,111
1,234*9+5=11,111
12,345*9+6=111,111
123,456*9+7=1,111,111
1,234,567*9+8=11,111,111
12,345,678*9+9=111,111,111
1+1+1=3  111/3=37
2+2+2=6  222/6=37
3+3+3=9  333/9=37
4+4+4=12  444/12=37
5+5+5=15  555/15=37
6+6+6=18  666/18=37
7+7+7=21  777/21=37
8+8+8=24  888/24=37
9+9+9=27  999/27=37

 
11의 제곱=121
111의 제곱=12,321
1,111의 제곱=1,234,321
11,111의 제곱=123,454,321
111,111의 제곱=12,345,654,321
1,111,111의 제곱=1,234,567,654,321
11,111,111의 제곱=123,456,787,654,321
111,111,111의 제곱=12,345,678,987,654,321

 

33*3,367=111,111
66*3,367=222,222
99*3,367=333,333
132*3,367=444,444
165*3,367=555,555
198*3,367=666,666
231*3,367=777,777
264*3,367=888,888
297*3,367=999,999
123456789+12345678+1234567+123456+12345+1234+123+12+1=1083676269
987654321+87654321+7654321+654321+54321+4321+321+21+1=1083676269