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2019中考数学一轮复习第一部分教材同步复习第一章数与式第1讲实数及其相关概念权威预测.doc

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1第一部分 第一章 第 1 讲13 的倒数是_ _.132舌尖上的浪费让人触目惊心，据统计中国每年浪费的食物总量折合粮食约 499.5 亿千克， 这个数用科学记数法(精确到十亿位)，应表示为_5.010 10_.32 019 的绝对值是( B )A2 019 B2 019C D12 019 12 019

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