巧算:2008除2009乘2010
问题描述:
巧算:2008除2009乘2010
答
2008*2010/2009
2009-1*2009+1*2009
(2009*2009-1)*2009
1-(1/2009)
2008/2009
答
2008÷2009×2010
=(2009-1)×1/2009×(2009+1)
=(2009-1)×(2009+1)×1/2009
=(2009²-1)×1/2009
=2009-1/2009
=2008又2008/2009
答
- 由投票者2009-04-07 20:32:14选出
2008÷2009×2010=?
原式=(2009-1)÷2009×(2009+1)
=(2009-1)(2009+1)/2009
=(20092-1)/2009
=2009-(1/2009)
=2009-0.00049776=2008.999502≈2009