来自黎达宇的问题
【小孩怎么去分6和9,还有就是加法减法的符号,最简单的方法,】
小孩怎么去分6和9,还有就是加法减法的符号,最简单的方法,
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2020-04-28 22:53
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罗成明
下面划一条横线区分6和9
加号是个“十”字,减号是一个“一”字
2020-04-28 22:54:01
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