2021年初一数学上册：一元一次方程知识点.pdf

初一数学上册：一元一次方程知识点|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 1 页，共 4 页第 2 页初一数学上册：一元一次方程知识点一元一次方程1等式与等量：用=号连接而成的式子叫等式.注意：等量就能代入 ！2等式的性质：等式性质 1：等式两边都加上或减去同一个数或同一个整式，所得结果仍是等式；等式性质 2：等式两边都乘以 或除以 同一个不为零的数，所得结果仍是等式.3方程：含未知数的等式，叫方程.4方程的解：使等式左右两边相等的未知数的值叫方程的解；注意：方程的解就能代入！5移项：改变符号后，把方程的项从一边移到另一边叫移项.移项的依据是等式性质1.6一元一次方程：只含有一个未知数，并且未知数的次数是 1，并且含未知数项的系数不是零的整式方程是一元一次方程.7一元一次方程的标准形式：ax+b=0 x 是未知数，a、b是数，且 a0.8一元一次方程的最简形式：ax=bx 是未知数，a、b 是数，且 a0.9 一元一次方程解法的一般步骤：整理方程去分母|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 2 页，共 4 页文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3第 3 页去括号移项合并同类项系数化为1检验方程的解.10列一元一次方程解应用题：1读题分析法:多用于和，差，倍，分问题 仔细读题，找出表示相等关系的关键字，例如：大，小，多，少，是，共，合，为，完成，增加，减少，配套-，利用这些关键字列出文字等式，并且据题意设出未知数，最后利用题目中的量与量的关系填入代数式，得到方程.2画图分析法:多用于行程问题 利用图形分析数学问题是数形结合思想在数学中的表达，仔细读题，依照题意画出有关图形，使图形各局部具有特定的含义，通过图形找相等关系是解决问题的关键，从而取得布列方程的依据，最后利用量与量之间的关系可把未知数看做量，填入有关的代数式是获得方程的根底.11列方程解应用题的常用公式：1行程问题：距离=速度时间；2工程问题：工作量=工效工时；3比率问题：局部=全体比率；4顺逆流问题：顺流速度=静水速度+水流速度，逆流速度=静水速度-水流速度；5商品价格问题：售价=定价折，利润=售价-本钱，；6周长、面积、体积问题：C圆=2R，S 圆=R2，C长|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 3 页，共 4 页文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3第 4 页方形=2(a+b)，S长方形=ab，C正方形=4a，S正方形=a2，S环形=(R2-r2),V长方体=abc，V正方体=a3，V 圆柱=R2h，V 圆锥=R2h.|精.|品.|可.|编.|辑.|学.|习.|资.|料.*|*|*|*|欢.|迎.|下.|载.第 4 页，共 4 页文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 ZN4I5M1Z4N3文档编码:CV9M6D6Y4N10 HO8R8N7K3O4 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