一年级数学上册第3单元1_5的认识和加减法《0》同步作业新人教版.doc

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10 的认识一、在里填数。二、在里填上“+”或“?” 。43=155=032=540=4三、用“”把下面的数从小到大排列起来。2、5、0、3、4、1参考答案一、 2,3;5,0二、 - , - ,+ , -(+)三、分析:这类题要求把一组数按数的大小顺序列起来,可以借助直尺的刻度分别找出这几个数的位置,再根据直尺上前面的数比后面的数小,或后面的数比前面的数大进行比较。题目要求从小到大排列这一线数,从直尺上可以看出 0 是起点,在 1 的前面,因此01,依次找出 12、23、34、45。解:012345

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