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数学7上：两个单项式是同类项，怎么求2B-A的值？整式加减常考题
数学7上：两个单项式是同类项，怎么求2B-A的值？整式加减常考题
七年级数学，代数式，单项式，多项式，整式加减，化简培优专题158/164
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数学7上：两个单项式是同类项，怎么求2B-A的值？整式加减常考题
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