沟通知识联系促进数学理解——以“倍数、分数、百分数和比应用问题”教学为例

• 作 者: 陈华忠
• 机 构: 福清市岑兜中心小学,
• 出 处: 教育科学论坛
• 发表日期: 2017年10期

【教材分析与思考】“倍数、分数、百分数和比”等知识的学习贯穿了整个小学阶段,分数和百分数问题既是倍数问题的扩展,又是研究数量之间关系的典型问题;新教材把“比”单独设单元,突出从量与量之间的关系这一角度去认识比,至此,对分数的意义有了多重解读:分数可以是一个表示量的数,也可以是分率,还可以是一个比……这些内容之间存在着必然的纵横联系,

【Textbook Analysis and Thinking】 The study of knowledge such as “multiple, fraction, percentage and ratio” runs through the whole primary school. The problem of score and percentage is not only an extension of the multiple problem but also a typical problem of the relationship between the quantities studied. To “” than "a separate unit, highlighting the relationship between quantity and quantity to understand this ratio, so far, there is a multi-point interpretation of the meaning of the score: the score can be a number that can be expressed, it can be points The rate, but also can be a ratio ... ... there is a necessary vertical and horizontal links between these contents,