快乐童年＿浩瀚天空

  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
123 x 9 + 7 = 1111111
123 7 x 9 + 8 = 11111111
123 78 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
123 x 8 + 6 = 987654
123 7 x 8 + 7 = 9876543
123 78 x 8 + 8 = 98765432
123 789 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
祝愿大家都发!发!发!

评论

小天天 发表于2007-12-07 09:04:08 学习

发表评论