2001*2002-1999*2004的簡化算式?
回答 (1)
2016-11-23 6:22 am
2001*2002 - 1999*2004
= 2001*2002 - (2001 - 2)(2002 + 2)
= 2001 * 2002 - (2001 * 2002 - 2 * 2002 + 2 * 2001 - 2 * 2)
= 2 * 2002 - 2 * 2001 - 2 * 2
= 2(2002 - 2001 - 2) = -2
= 2001*2002 - (2001 - 2)(2002 + 2)
= 2001 * 2002 - (2001 * 2002 - 2 * 2002 + 2 * 2001 - 2 * 2)
= 2 * 2002 - 2 * 2001 - 2 * 2
= 2(2002 - 2001 - 2) = -2
收錄日期: 2021-04-18 15:47:10
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20161122222051AA5mfcZ