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提高学生的计算能力,主要指使学生的计算正确、迅速,方法合理、灵活。要达到这样的要求,需要做多方面的工作。在教学实践中,我深刻地体会到讲清算理是很重要的一环。算理是计算的原理,是计算方法的依据。学生要能准确、迅速地计算,必须既掌握算法又懂得算理。如果不弄懂算理,算法就记不牢,更谈不上灵活运用。从学生的计算错误来看,很多情况其原因都是出于对算理的含糊不清。如果学生懂得了2/7表示2个1/7,3/7表示3个1/7,2/7+3/7 就是求2个1/7与
Improve students' computing power, mainly refers to the calculation of the students correct, rapid, reasonable and flexible approach. To achieve such a requirement, there is a need to do a great deal of work. In teaching practice, I deeply understand that it is a very important part of clarifying the settlement. Calculation is the principle of calculation is the basis of calculation methods. Students should be able to calculate accurately and quickly, must have both algorithm and arithmetic. If you do not understand arithmetic, the algorithm will not remember firmly, let alone flexible use. From the calculation error of the students, in many cases the reason is out of the ambiguity of the arithmetic. If students know 2/7 that two 1 / 7,3 / 7 that 3 1 / 7,2 / 7 + 3/7 is to find two 1/7 and