(-270)0.25+0.2521.5+(-8.5)*(-0.25)=?

分类: 作业答案 • 2021-12-19 16:57:45

问题描述：

(-270)*0.25+0.25*21.5+(-8.5)*(-0.25)=?

答

(-270)*0.25+0.25*21.5+(-8.5)*(-0.25)
＝0.25x(-270+21.5+8.5)
=0.25x-240
=0.25x4x-60
=-60

(-270)*0.25+0.25*21.5+(-8.5)*(-0.25)=?