2北师大版二年级数学上册知识点汇总
北师大版二年级数学上册知识点汇总第一单元加与减1、100以内数的连加运算:口算方法:把两位数分成整十数和一位数,整十数加整十数,一位数加一位数,再把两个结果相加。笔算方法:先把前两个数相加,再用它们的和加上第三个数,或者用竖式直接把三个数相加,相同数位对齐,从各位加起,个位相加满几十就向前一位进几。2、100以内数的连减计算方法:按照从左到右的顺序,先求出前两个数的差,再用所得的结果减去第三个数。3、100以内数的加减混合运算计算方法:按照从左到右的顺序依次进行计算,计算过程中可以口算的不必列竖式计算。第二单元购物一、认识人民币1、人民币的单位:元、角、分以元为单位的人民币:1元、2元、5元、...
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