數學是科學之母
>
>
>
>
>
> *數學好好玩 *
>
> 3 x 37 = 111
> 6 x 37 = 222
> 9 x 37 = 333
> 12 x 37 = 444
> 15 x 37 = 555
> 18 x 37 = 666
> 21 x 37 = 777
> 24 x 37 = 888
> 27 x 37 = 999
>
> nice one:
> 111,111,111 x 111,111,111 =
> 12,345,678,987,654,321
>
> trapeze:
> 0x 9 + 1 = 1
> 1 x 9 + 2 = 11
> 12 x 9 + 3 = 111
> 123 x 9 + 4 = 1111
> 1234 x 9 + 5 = 11111
> 12345 x 9 + 6 = 111111
> 123456 x 9 + 7 = 1111111
> 1234567 x 9 + 8 = 11111111
> 12345678 x 9 + 9 = 111111111
> 123456789 x 9+10 = 1111111111
>
> another trapeze:
> 1 x 8 + 1 = 9
> 12 x 8 + 2 = 98
> 123 x 8 + 3 = 987
> 1234 x 8 + 4 = 9876
> 12345 x 8 + 5 = 98765
> 123456 x 8 + 6 = 987654
> 1234567 x 8 + 7 = 9876543
> 12345678 x 8 + 8 = 98765432
> 123456789 x 8 + 9 = 987654321
>
> and another one:
>
> 0x 9 + 8 = 8
> 9 x 9 + 7 = 88
> 98 x 9 + 6 = 888
> 987 x 9 + 5 = 8888
> 9876 x 9 + 4 = 88888
> 98765 x 9 + 3 = 888888
> 987654 x 9 + 2 = 8888888
> 9876543 x 9 + 1 = 88888888
> 98765432 x 9 + 0 = 888888888
> 987654321 x 9 - 1 = 8888888888
> &nbs
自:Bbs.Faloo.com
------------------------------
[复制本帖地址] //bbs.faloo.com/t/1304940.html
|
|
