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广西专用2019中考物理一轮新优化专题七综合计算题课件2019012944.ppt

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专题综合强化,第二部分,专题七 综合计算题,中考热点 精讲,计算题解题步骤 1画出关键词 通过题中的关键词联想所学知识并锁定知识范围 2画出关键数据和找出隐含条件 通过题中的关键数据明确已知条件，并找出已知场景中的隐含条件,3画出问题 通过题中的问题写出题中可能所需的计算公式 4找等量关系 等量关系一般是题中不变的量(可已知也可未知)通过公式与题目中的条件建立的联系,利用环境限制条件加关键数据最终选择出适合本题的公式.并将公式用等量关系建立等式，将对应的数据代入其中，最后解答,

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