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《义务教育数学课程标准(2011版)》指出:培养运算能力有助于学生理解运算的算理,寻求合理简洁的运算途径解决问题。学生在小学中的每个年级都要学习相关的计算内容,一定要培养学生学会观察,准确计算并会及时进行验算。一、反复比较,优化算法学习口算时,可以先让学生独立思考,想出不同的口算方法。老师可以从学生的回答中,找出具有代表性的口算方法,带领大家一起来比较,进而发现简便的计算方法。要让学生找出口算时
“Compulsory Education Mathematics Curriculum Standard (2011 Edition)” pointed out: to develop computing power helps students understand arithmetic computing, seeking a reasonable and concise way to solve the problem. Students in each grade in primary school to learn the relevant computing content, we must develop students learn to observe, accurate calculation and timely checking. First, repeated comparison, optimization algorithm Mouth arithmetic, you can let students think independently, come up with different methods of calculation. From the students’ responses, the teacher can find out representative methods of oral calculation and lead us to compare together so as to find a simple calculation method. Let students find out when calculating