问题
计算题
20082﹣2007×2009.
答案
解:20082﹣2007×2009,
=20082﹣(2008﹣1)(2008+1),
=20082﹣(20082﹣12),
=20082﹣20082+1,
=1.
20082﹣2007×2009.
解:20082﹣2007×2009,
=20082﹣(2008﹣1)(2008+1),
=20082﹣(20082﹣12),
=20082﹣20082+1,
=1.