小学二年级上册上学期-人教版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二年级数学上册知识点汇总丨人教版,暑期预习第一单元长度单位1、常用的长度单位:米、厘米。2、测量较短物体通常用厘米作单位,测量较长物体通常用米作单位。3、测量物体长度的方法:将物体的左端对准直尺的“0”刻度,看物体的右端对着直尺上的刻度是几,这个物体的长度就是几厘米。4、米和厘米的关系:1米=100厘米100厘米=1米5、线段(1)线段的特点:①线段是直的;②线段有两个端点;③线段有长有短,是可以量出长度的。(2)画线段的方法:先用笔对准尺子的’0”刻度,在它的上面点一个点,再对准要画到的长度的厘...
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