2007×0.999-2008×0.998简便计算_其他解答

2007×0.999-2008×0.998简便计算

人气：463 ℃　时间：2020-02-02 23:09:45

解答

=2007×0.999-2007×0.998-0.998
=2007×(0.999-0.998)-0.998
=2.007-(1-0.002)
=2.007-1+0.002
=1.009