在多年的教学中,总感觉到学生在学习“年、月、日”时对闰年知识的理解上存在一点点欠缺,具体表现为“四年一闰”记忆深刻,而对整百年闰的问题常常忽略。起因陈述:人教版教材中,有这样一道练习题:“小强12岁的时候,只过了3个生日,猜一猜他是哪一天出生的。”学生的回答是他出生在闰年2月29日,因为他只能4年过一个生日。就这样一道题,给学生留下了“四年一 In years of teaching, students always feel that there is a little lack of understanding of leap year knowledge when learning ”year, month, day“. The concrete manifestation is that ”four years an intercourse“ Problems of hundred years are often overlooked. Cause statement: PEP textbook, there is such an exercise: ”Xiaoqiang 12 years old, only three birthday, guess what day he was born.“ ”The student’s answer is that he was born in a leap year February 29, because he can only have a birthday in four years. On such a question, to students left "four years one