作业帮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!
来源：学生作业帮助网 编辑：作业帮 时间：2024/10/02 11:24:51
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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!
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!
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!
(-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
(-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