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1.掌握算理是基础。在计算中每一次运算都有一定的理论依据,掌握这些理论依据是培养学生计算能力的前提,如果不懂得算理,只是机械地训练,就无法适应千变万化的具体计算情景。《义务教育数学课程标准(2011年版)》中指出:笔算教学应把重点放在对算理的理解上,根据算理,掌握法则,再以法则指导计算。在计算教学中,有些教师认为没有什么道理可讲,只要让学生掌
1. Mastery of arithmetic is the foundation. Each calculation in the calculation has a certain theoretical basis, to grasp these theoretical basis is to cultivate the students ability to calculate the premise, if you do not know arithmetic, just mechanical training, you can not adapt to the ever-changing specific computing scenarios. Compulsory Education Mathematics Curriculum Standard (2011 Edition) pointed out: pen teaching should focus on the understanding of arithmetic, according to arithmetic, grasp the law, and then the law to guide the calculation. In computing teaching, some teachers think there is no reason to say, as long as the students palm