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歡迎您訪問每日一練:據(jù)大慶市海關統(tǒng)計,2010年1月至4月,大慶市共出!

每日一練:據(jù)大慶市海關統(tǒng)計,2010年1月至4月,大慶市共出

更新時間:2024-01-12 12:55:01作者:貝語網(wǎng)校

據(jù)大慶市海關統(tǒng)計,2010年1月至4月,大慶市共出口創(chuàng)匯14880000元。1488000這個數(shù)用科學記數(shù)法表示為

A.1. 488×104

B.1. 488×105

C.1. 488×106

D.1. 488×107

試題答案

D

試題解析

科學記數(shù)法的表示形式為a×10n的形式.其中1≤|a|<10,n為整數(shù),確定n的值時,要看把原數(shù)變成a時,小數(shù)點移動了多少位,n的絕對值與小數(shù)點移動的位數(shù)相同.當原數(shù)絕對值大于10時,n是正數(shù);當原數(shù)的絕對值小于1時,n是負數(shù).

解答:解:1 488 0000=1.488×107

故選D.

點評:此題考查科學記數(shù)法的表示方法.科學記數(shù)法的表示形式為a×10n的形式,其中1≤|a|<10,n為整數(shù),表示時關鍵要正確確定a的值以及n的值.

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