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ISBN: 9787518011896
File size: 82171 KB

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by 稚子文化

ebook

本书主要内容包括：50以内的加减法、50以内的加减法竖式、50以内的连加减、50以内的加减混合运算、50以内的应用题、认识数字51-60、60以内的加减法、60以内的加减法竖式等。