七年级数学上册第2章有理数2.1有理数2.1.1正数和负数课件(新版)华东师大版.ppt

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第2章 有理数,2.1 有理数,知 识 管 理,学 习 指 南,归 类 探 究,当 堂 测 评,分 层 作 业,1.正数和负数,学 习 指 南,知 识 管 理,向西,零下,支出,升高,买进,归 类 探 究,当 堂 测 评,B,C,B,3,分 层 作 业,B,A,A,B,C,亏损3万元,38,1,23,38,0,1,38,0,23,1,3.14,0.01,3.14,0.01,2.8,,3.14,0.01,B,A,10,0.2,0.1,0.2,0.4,0.1,0.3,0.2,

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