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Why does "-1" not work to subtract 1?

score 346 · Answer 1 · 2008-12-02T19:53:40.207000

346 views Asked by mspan At 02 December 2008 at 19:53

score 285 · Answer 2 · 2008-11-10T10:13:56.177000

285 views Asked by massimogentilini At 10 November 2008 at 10:13

score 7305 · Answer 3 · 2008-11-03T09:49:05.433000

7.3k views Asked by Karl R At 03 November 2008 at 09:49

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