数学课程标准强调:“应重视口算,加强估算。”在不同版本的教材中都有估算的内容,但无论是教师还是学生,对估算教学都不够重视,克服这种现象需要从多方面努力。对教学的功利性需求是影响估算教学质量的重要原因。许多人认为,学生上学读书就是学习—考试—升学,只要是考试没有的内容或升学不需要的东西,都是没用的,都可以放在一边。更何况已经掌握了准确计算,学习估算有什么用?实际上,在现代科技条件下, Mathematical curriculum standards emphasize: “should pay attention to port count, to strengthen the estimate. ” There are estimates in different versions of textbooks, but neither teachers nor students pay enough attention to the estimation of teaching, to overcome this phenomenon needs in many ways Work hard. The utilitarian demand for teaching is an important factor that affects the quality of teaching. Many people think that when students go to school and study, they are studying, exams, and furthering their studies. As long as they have no exams or do not need further studies, they are useless and can be left aside. Let alone have mastered the accurate calculation, what is the use of learning estimates? In fact, under the conditions of modern science and technology,