问题 解答题

一种电子产品合格率为90%,如果生产一批2000只,不合格产品有多少只?

答案

2000×(1-90%),

=2000×10%,

=200(个),

答:不合格产品有200只.

单项选择题 案例分析题
填空题

读课文,再按要求填空。 

1.第一次顶碗失败后观众的表现                                                                                         ,   

少年的表现                                                                                                                          。 

2.第二次顶碗失败后观众的表现                                                                                         ,  

少年的表现                                                                                                                          。 

3.第三次顶碗成功后观众的表现                                                                                         ,   

少年的表现                                                                                                                           ,   

从少年顶碗这件事情中你得到了                                                                                         的启示。