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重视让学生通过对学具的亲手操作,获得数的概念,领会计算方法。认数是计算的前提基础,反过来,计算可以加深对数的概念的认识,要使学生获得正确的概念和计算方法,不能离开学生的亲手操作,这是培养学生计算能力的重要环节。教学中应放手让学生独立思考,给学生足够的时间,使学生能经历口算算法的探索过程,便于他们弄清算理掌握算法。并让学生展示不同的算法,且在汇报交流时引导学生理解并掌握一些基本的算法。
Emphasis is placed on students’ understanding of the concept of numbers through the hands-on operation of the learning tools. Recognition is the basis of calculation. In turn, the calculation can deepen the understanding of the concept of logarithm. For students to acquire the correct concepts and calculation methods, they can not leave the student’s hands-on operation. This is an important part of developing students’ computing abilities. Teaching should allow students to think independently, give students enough time to enable students to experience the process of calculating the mouth of the algorithm to facilitate them to understand the arithmetic master algorithm. And let the students show different algorithms, and guide students to understand and master some basic algorithms in the exchange of reports.