小学二年级上册上学期-苏教数学重点知识点汇总
 
                                    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 苏教版数学二年级上册知识点一、100以内的笔算加法和减法1.用竖式计算两位数加法时: ①相同数位对齐。 ②从个位加起。 ③如果个位满10,向十位进1。2.用竖式计算两位数减法时: ①相同数位对齐。 ②从个位减起。 ③如果个位不够减,从十位退1,个位加10再减,计算时十位要记得减去退掉的1。3.划线一定要用尺子,抄错数是一个严重的问题。4.求“一个已知数”比“另一个已知数”多多少.少多少? 要弄清楚数量之间的关系,知道谁比谁多,谁比谁少,再分析用加法还是减法。5.连加连减和加减混合时注意加减号...
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