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23#
發表於 2009-3-26 01:29 PM
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pure math
$ ^! A1 ]$ f7 u公仔箱論壇5.39.217.761 b& u0 \- y6 R0 H
[250(80x+1)+2y-250]/2 = (250*80x+2y)/2 = (2000x+2y)/2 = 1000x+y
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/ r! n- x7 X. d4 Y" Z! H8 r. g6 L( d5.39.217.76if x = 111 y = 2222, you number is 111-2222 |
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