打印版

1×9 + 2= 11
12×9 + 3= 111
123×9 + 4= 1111
1234×9 + 5= 11111
12345×9 + 6= 111111
123456×9 + 7= 1111111
1234567×9 + 8= 11111111
12345678×9 + 9= 111111111
123456789×9 +10= 1111111111

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

1×1= 1
11×11= 121
111×111= 12321
1111×1111= 1234321
11111×11111= 123454321
111111×111111= 12345654321
1111111×1111111= 1234567654321
11111111×11111111= 123456787654321
111111111×111111111=12345678987654321