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ru he pei yang jia jian fa de kou suan neng li " yi bai yi nei de jia jian fa " de jiao xue wei li
Pages: 29-30
Year: Issue:  6
Journal: XIAOXUE JIAOXUE

Abstract:  学习"百以内的加减法",需要具备以下知识或经验:①对加法与减法的计数策略的理解.加法是继续往下数的计数策略,减法是往回数的计数策略.②对加法与减法的运算规律的体验.从学习10以内加减法的过程以及整理加法表与减法表的过程,获得这种体验.③探索20以内加减法口算和笔算的数学活动经验.
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