Curiosidades de los números naturales

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1x8+1=9                                                                                123456x8+6=987654
12x8+2=98                                                                            1234567x8+7=9876543
123x8+3=987                                                                        12345678x8+8=98765432
1234x8+4=9876                                                                    123456789x8+9=987654321
12345x8+5=98765

1x9+2=11                                                                              12345x9+6=111111
12x9+3=111                                                                          123456x9+7=1111111
123x9+4=1111                                                                      1234567x9+8=11111111
1234x9+5=11111                                                                  12345678x9+9=111111111

9x9+7=88                                                                              98765x9+3=888888
98x9+6=888                                                                          987654x9+2=8888888
987x9+5=8888                                                                      9876543x9+1=88888888
9876x9+4=88888                                                                  98765432x9+0=888888888

1x1=1                                                                                    11111x11111=123454321
11x11=121                                                                            111111x111111=12345654321
111x111=12321                                                                    1111111x1111111=1234567654321
1111x1111=1234321                                                            11111111x11111111=123456787654321