数学教师的计算应力求灵巧简便肖鉴铿（南昌师范学校）前两年，小学数学界的一位同仁就曾告诉过我，每逢数学测验，面对一些四则计算试题，总会有一些学生发问：＂老师，这道题要不要用简便方法计算？＂初听时，感到这样问很可笑，因为简便运算是人们找到的一些化繁为简、... Mathematics teacher's calculation should be clever and simple Xiao Jiankeng (Nanchang Normal School) A couple of years ago, primary mathematics community once told me that every math test, in the face of some four calculation questions, there are always some students asking: “Teacher, this question is not to use a simple method of calculation?” When I first heard, I feel very ridiculous to ask, because the simple operation is that some people find something complicated, ...