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整除性 ( 一 ). http://pmaths.moderneducation.com.hk/edu_platform/login/teacher/primary/mathsIII/index.jsp. 哪個數是偶數? 它們又能否被 2 整除呢?. 888. 157. . . 5,743. . 24,680. 1,809,892. . . 這些數能否被 5 整除呢?. 885. 157. . . 5,743. . 24,680. 1,809,890. . . 253+2. 253+2. 2. 7. 96. 96. - PowerPoint PPT PresentationTRANSCRIPT
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http://pmaths.moderneducation.com.hk/edu_platform/login/teacher/primary/mathsIII/index.jsp
![Page 2: pmaths.moderneducation.hk/edu_platform/login/teacher/primary/mathsIII/index.jsp](https://reader036.vdocuments.pub/reader036/viewer/2022081821/5681378e550346895d9f2ba5/html5/thumbnails/2.jpg)
哪個數是偶數?它們又能否被 2 整除呢?
157 888
1,809,89224,680
5,743
![Page 3: pmaths.moderneducation.hk/edu_platform/login/teacher/primary/mathsIII/index.jsp](https://reader036.vdocuments.pub/reader036/viewer/2022081821/5681378e550346895d9f2ba5/html5/thumbnails/3.jpg)
這些數能否被 5 整除呢?
157 885
1,809,89024,680
5,743
![Page 4: pmaths.moderneducation.hk/edu_platform/login/teacher/primary/mathsIII/index.jsp](https://reader036.vdocuments.pub/reader036/viewer/2022081821/5681378e550346895d9f2ba5/html5/thumbnails/4.jpg)
依指示填寫個位的數字• 96 是一個能被 2整除的三位數。
• 253+2 的結果是一個能被 5整除的數。
496296096 696 896
2253+2 7253+2
=275 =280
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把 353加上一個數,使結果分別是可以被 2 、 5 或 10整除的數
•結果是可以被 2 整除的數: 353+ =•結果是可以被 5 整除的數: 353+ =•結果是可以被 10整除的數: 353+ =