3.72≈
3.7
3.7
(保留一位小數(shù));2.0986≈
2.10
2.10
(精確到百分位)
分析:保留一位小數(shù),即精確到十分位,看小數(shù)點后面第二位(百分位);精確到百分位,即保留小數(shù)點后面第二位,看小數(shù)點后面第三位;利用“四舍五入”法分別解答即可.
解答:解:3.72≈3.7(保留一位小數(shù));
2.0986≈2.10(精確到百分位);
故答案為:3.7,2.10.
點評:此題主要考查小數(shù)的近似數(shù)取值,關(guān)鍵要看清精確到的位數(shù).
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