Tuesday, September 18, 2007

算24

4 4 7 7
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2 comments:

su said...

真够有聊的
确定有答案的话，咱就来想想

September 18, 2007 at 6:59 PM
qevan said...

（4-4/7）*7=24

September 18, 2007 at 9:17 PM

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