二元一次方程组ppt课件.pptx

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1、二元一次方程组1含有一个未知数，并且未知数的次数是1系数不等于0的方程叫做一元一次方程。方程ax+b=0(a≠0）叫做一元一次方程的标准形式。使方程左、右两边的未知数的值相等的未知数的值，叫做方程的解。2你知道篮球比赛胜负排名的规则吗？3二元一次方程4学习目标：1、理解二元一次方程、二元一次方程组的概念2、理解二元一次方程的解及二元一次方程组的解概念3、并会检验一组未知数的值是否是方程的解或方程组的解4、能通过设两个未知数，将实际问题转化为二元一次方程组5自学指导：认真看课本P93~94的内容完成：1、弄清二元

2、一次方程、二元一次方程组的概念及它们的解的概念2、能通过设两个未知数，将实际问题转化为二元一次方程组。会检验方程的解或方程组的解5分钟后,比谁能正确地完成检测及练习6课堂练习：请判断下列各方程中，哪些是二元一次方程，哪些不是？并说明理由。(1)2x+5y=10(2)2x+y+z=1(5)2a+3b=5(6)2x+10xy=0(3)x+y=202(4)x+2x+1=02m.leju.com/touch/house/zhuhai/139292/m.leju.com/touch/house/jiangmen/1176

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