20.0937-200.91.9+2009*0.82怎样简算?

分类: 作业答案 • 2021-12-29 14:59:03

问题描述：

20.09*37-200.9*1.9+2009*0.82怎样简算?

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

20.09*37-200.9*1.9+2009*0.82怎样简算?