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    微妮主页 >> 文章 >> 教研札记 >> 浏览信息《数学顺口溜》

    教研札记 | 评论(1) | 阅读(1165)
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    星期三   晴天 
    主题 数学顺口溜

    连续退位的减法:

      看到0,向前走,看看哪一位上有。

      借走了往后走,0上有点看作9。


           多位数大小比较

    位数不同比大小,位数多的大,位数少的小。

      位数相同比大小,高位比起就知道。

      大于号、小于号,开口对着大数笑,

      这样记住错不了。

               年、月、日

       一、三、五、七、八、十、腊(十二月),

       三十一天永不差。

       四、六、九、冬(十一月)三十整;

       唯有二月最特殊,

       平年二月二十八,闰年二月二十九。

              平年、闰年

       四年一闰、百年不全闰、四百年又闰。

       平年、闰年好判断,

       个位是奇(单数)不用除,一看就是有余数;

       一般年份后两位,整百年份两0前,分别除以4来判,

       有余数是平年,干干净净是闰年。

             除数是一位数的除法

       除数一位看一位,一位不够看两位,(一看)

       除到哪位商那位,          (二商三乘减)

       除数当姐余当妹。(四比五余)

    角的度量

    “点对点,边以边,找0度,认刻度”

    除数是两位的除法
    除数两位看两位,两位不够看三位。
    除到哪位商那位,记熟口诀定好位。

       试商方法要灵活,不够商“1”“0”占位。
    余数要比除数小,然后再除下一位。

           商中间或末尾有0的除法:

    (转载)

       我是0,本事大,除法运算显神通。

       不够商1我来补。有了空位我就坐。

       别人要想把我除,常胜将军总是我。  

    “除”的意义:  

       看到“除”,圈一圈,“除”字前面是除数,

    “除”字后面被除数,位置交换别忘了。

    微妮 发表于:2012-9-19 20:12:40

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