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除法的初步認識測試題
除法的初步認識測試題
更新时间:2025-04-04 06:09:09

題目:希望杯數學初二

除法的初步認識測試題(解希望杯數學題)1

分析:整除性質具要有

1、若有c|a,c丨b,則有c丨a+b,c丨a-b,c丨ab;

2、若有c丨a,k為正整數,則有c丨ka。

解:∵d丨19n+14

∴d|190n+140

∵d|10n+3

∴d|190n 57

∴ d|83

又∵83為質數,d不為1的自然數

∴d=83

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