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    東方明珠小學生日記大全網

    關于分數的學習

    東方明珠小學生日記大全網 http://www.azhugong.com 2019-05-30 12:18 出處:網絡 編輯:

      上個星期,我們學習了分數。分數有分子、分。母。和分數線,比如:1/3,3是分母,1是分子,中間一橫是分數線。


      生活中有很多地方都要用到分數,比如:一本書有三十頁,每一頁是一本書的1/30。分數還可以用來加減呢!比如:二分之一加二分之一等于二分之二,也就是1。為什么會這樣呢?如。果一個餅把它平均分成兩份,每份就是這個餅的1/2,再把這兩份拼起來,就是有2個1/2,剛好是一個餅。分數在加減時,如果分母都是一樣的,就不管分母,把分子相加就可以了。而2/2的分子和分母都一樣,就是1了。


      我還學會了比分數的大小,老師教了我們口訣:分子相同比分母,分母大的分數小,分母小的分數大;分母相同比分子,分子大的分。數大,分子小的分數小。


      老師還提醒我們,寫分數時,一般先寫分數線,表示平均分的意思,再寫分母,最后寫。分子.








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