前几天听一位青年教师上“时、分的认识”,课上出现了这样一道填空题:钟面上有( )个数。当时,学生的回答很合老师的意:“钟面上有12个数。”可是,仔细一想,钟面上真是都有12个数吗?好像并非如此。课后,我问学生:“你们见过的钟面上都有几个数?”这下同学们讨论开了。有的说,我家的挂钟上一个数也没有;有的说妈妈的手表上有6个数,是一 A few days ago to listen to a young teacher on the “hour and minute understanding,” there was a class fill in the blank title: clock face () number. At that time, the students' responses matched the teacher's remark: “There are 12 numbers on the face of the clock.” However, a closer look at the number of faces on the face of the clock does not seem to be the case. After class, I asked the student: “How many times have you seen the clock face?” The classmates debated. Some say that there is not a single number on my home's wall clock; some say that there are 6 numbers on her mother's watch,