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本书是青少年学生进行学习兴趣培养和智力开发的最佳读物，根据奥林匹克集训和选题的具体内容相应进行分章且归类排列，具有很强的可读性、启迪性和知识性。具体包括：什么叫"二进位制"、什么叫做进位制、什么叫做计数单位、"十进位制"是怎样形成的、"准确数"和"近似数"等。
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