2022年2018青岛版七年级数学下册10.2《二元一次方程组的解法》3教学案 .pdf
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1、名师精编优秀教案课题10.2 二元一次方程组的解法(3)课型复习课授课时间20XX年月日执笔人代朝东审稿人七年级教学组总第 4 课时课标要求掌握代入法和加减法解二元一次方程组。学习目标1.熟练掌握代入法和加减法解二元一次方程组;2.能根据方程组的特点选择合适的方法解3.通过分析相关问题中的数量关系,建立方程解决问题,进一步认识方程模型的重要性。教 学 活 动 方 案随记【自主复习】1.解二元一次方程组有哪几种方法?它们的实质是什么?2.分别用代入法和加减法解方程组代入法:加减法:二元一次方程组组一元一次方程消元代入、加减3x+4y=19 xy=4 名师精编优秀教案教 学 活 动 方 案随记【典
2、型例析】1.已知,则 a+b 等于()A3 B38 C 2 D1 2.若方程组的解 x 与 y 的和为 0,求 k 的值。3.解方程组【有效训练】1.解方程组a+2b=4 3a+2b=8 3x+5y=k+2 2x+3y=k 2x+3y=7 3(x2)=2(y9)2x+3y=5 3x=2y6 文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN
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6、ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文
7、档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8
8、Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R
9、5 ZN1Y6A2A10C3名师精编优秀教案教 学 活 动 方 案随记2.若方程组23352xymxym的解满足x+y=12,求 m值。【反馈矫正】若关于 x,y 的二元一次方程组的解也是二元一次方程2x+3y=6 的解,则k 的值是多少?【作业布置】1.解下列方程组:(1)(2)x+y=5k xy=9k y1=3(x2)y+4=2(x+1)3434yx5(x9)=6(y2)文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5
10、ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文
11、档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8
12、Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R
13、5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C
14、3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4A8Y4 HN7K1P4K2R5 ZN1Y6A2A10C3文档编码:CJ2W4G4
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