二年级上册数学期末总复习
1二(上)数学期末总复习第一部分长度单位、角度初步认识一、基础知识(一)长度单位1、长度单位:米、厘米2、在生活中,量比较短的物品,可以用厘米做单位;量比较长的物体,常用米做单位。3、厘米可以用“CM”表示,米可以用“M”表示。4、1米=100厘米5、测量物体:把尺子的刻度0对准物体的左端,看物体的右端对着几。6、线段:(1)线段是直的;(2)线段有两个端点。(二)角度初步认识1、一个角有1个顶点,2条直的边。2、三种角:锐角、直角、钝角锐角:比直角小;钝角:比直角大。二、同步练习1、量一量这支回形针长()厘米2、填空100厘米=( )米;45米+5米=( )米;9米-600厘米=()米8...
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