小学二年级上册上学期-数学校内知识及公式归纳
更多1-6年级复习辅导资料,请关注“我是晓慧”WeiXin公众号获取下载:xiaohui77com二年级数学校内知识点及公式大全一、被除数、除数、商三者的关系:被除数÷除数=商被除数÷商=除数商×除数=被除数除数×商+余数=被除数.比二、四则运算定律:加法交换律:a+b=b+a,加法结合律:(a+b)+c=a+(b+c)乘法交换律:ab=ba,乘法结合律:(ab)c=a(bc)乘法分配律:(a±b)c=ac±bc三、四则混合运算运算顺序:更多1-6年级复习辅导资料,请关注“我是晓慧”WeiXin公众号获取下载:xiaohui77com在四则运算中,加法和减法称为第一级运...
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