有理数乘法简便计算（1道）(-5.25)(-4.73)-4.73(-19.75)-25*(-5.27)=?简便的,THANK YOU!

分类: 作业答案 • 2021-12-19 15:48:57

问题描述：

有理数乘法简便计算（1道）
(-5.25)*(-4.73)-4.73*(-19.75)-25*(-5.27)=?
简便的,THANK YOU!

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(-4.73-5.27)
=-25*(-10)
=250

答

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

有理数乘法简便计算（1道）(-5.25)*(-4.73)-4.73*(-19.75)-25*(-5.27)=?简便的,THANK YOU!