(-5.25)x(-4.73)-4.73x(-19.75)-25x(-5.27)怎么求?

分类: 作业答案 • 2021-12-28 15:59:14

问题描述：

答

(-5.25)*(-4.73)-4.73*(-19.75)-25*(-5.27)
=(-4.73)*[-5.25+(-19.75)]-25*(-5.27)
=(-4.73)*(-25)+(-25)*(-5.27)
=(-25)*(-10)
=250