新人教版五下数学第8单元《数学广角——找次品》测试卷
人教版小学数学五年级下册第八单元试题一、基础练习1、有7瓶药片,其中1瓶中少2片,应该怎么分,称的次数最少而且保证能找出次品?2、如果有12个零件,其中一个是次品,应该怎么分,称的次数最少而且保证能找出次品?二、巩固练习。(要求运用图示法表示出思维过程)1、一箱水果糖有7袋,其中6袋质量相同,另外有一袋质量轻一些,用天平称至少称几次保证找出轻的一袋?2、有8个外观一样的乒乓球,其中有一个是次品,次品比其他球轻一些,用天平最少称几次才能保证找到次品?3、现有10个零件,其中有一个是次品(次品重一些),用天平称,最少称几次就一定能找出次品来?4、有13瓶水,其中12瓶质量相同,另外有1瓶是糖水,比...
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