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http://pmaths.moderneducation.com.hk/edu_platform/login/teacher/primary/m athsIII/index.jsp

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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 Presentation

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Page 1: pmaths.moderneducation.hk/edu_platform/login/teacher/primary/mathsIII/index.jsp

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

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

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

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

Page 5: pmaths.moderneducation.hk/edu_platform/login/teacher/primary/mathsIII/index.jsp

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+ =