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四年级-数学（人教版）-数学广角：鸡兔同笼第一课时

视频地址：https://video.cache.bdschool.cn/vd/3775f5903b69f83aefc5de39a5625ce6.mp4
附件：0624四年级数学（人教版）-数学广角：鸡兔同笼第一课时-1教案.docx
附件：0624四年级数学（人教版）-数学广角：鸡兔同笼第一课时-2PPT课件.pdf
附件：0624四年级数学（人教版）-数学广角：鸡兔同笼第一课时-3学习任务单.docx

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四年级-数学（人教版）-总复习：小数的意义及运算四年级-数学（北京版）-总复习：图形与几何

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