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歡迎您訪問數學考題練習:由四舍五入取得的近似數5.31萬和5.31×1!

數學考題練習:由四舍五入取得的近似數5.31萬和5.31×1

更新時間:2024-01-12 14:10:54作者:貝語網校

由四舍五入取得的近似數5.31萬和5.31×104,下列說法正確的是

A.有效數字相同,精確度相同

B.有效數字相同,精確度不同

C.有效數字不同,精確度相同

D.有效數字不同,精確度不同

試題答案

A

試題解析

根據“萬”和104等同,可得正確選項.

解答:∵1萬=104

∴近似數5.31萬和5.31×104有效數字相同,精確度相同.

故選A.

點評:考查近似數的有關知識;注意用漢字單位和等同的10n表示的近似數的有效數字和精確度是相同的.

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