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一年级数学下册第1单元加与减（一）用8、9的加减法解决问题拓展资料素材（新版）北师大版.docx

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1用 8、9 的加减法解决问题只移动一根火柴棒，使右边等式成立。分析：左边得数是 5，右边得数是 9，等号两边不相等，等式不成立。要使等式成立，可将左边的结果不变，右边的结果变小。

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