20.09*37-200.9*1.9+2009*0.82怎样简算?_数学解答

20.09*37-200.9*1.9+2009*0.82怎样简算?

人气：253 ℃　时间：2020-01-25 05:43:24

解答

20.09*37-200.9*1.9+2009*0.82
=2009*0.37-2009*0.19+2009*0.82
=2009x(0.37-0.19+0.82)
=2009x1
=2009