幸福街區

呵呵～我從小到大最怕的就是數學，什麼植樹問題、雞兔同籠、牛吃草等，時至今日仍一概不懂。尤其現在要幫小孩複習數學功課，都覺得頭疼，像什麼８×７就是８個７，也就是７的８倍，就搞得我七葷八素的．．

以下這篇【數學是科學之母】也是好友e來的，提供給有興趣的格友研究研究，也或許你知道的比這些還更多唷．．．

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:

 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

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:

0 x 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
9876543210 x 9 - 2  = 88888888888