(-270)*0.25+0.25*21.5+(-8.5)*(-0.25)=?_数学解答

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

人气：258 ℃　时间：2020-03-04 20:07:18

解答

(-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