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所谓口算,指的是学生一边用心算一边用口说的运算方法,也可以理解为不借助计算工具和竖式计算,而依靠记忆或借助数字之间的关联,直接通过思维算出结果的一种计算方法。《义务教育数学课程标准》在“数与代数”的教学中明确指出:重视口算。口算能力是小学生计算能力的重要组成部分,是笔算、估算和简便计算的基础,具有用时少、形式活、容量大、速度快的特点,是培养学生数感的一种好方法。口算教学看似简单,实则难以把握。那
The so-called mouth count, refers to the students while hard-hearted while using the mouth of the computing method can also be understood as without the aid of computing tools and vertical computing, and rely on memory or by the relationship between numbers directly through the calculation of a result of thinking Calculation method. “Compulsory education mathematics curriculum standards” in the “number and algebra ” teaching clearly states: emphasis on accounting. The ability of counting ability is an important part of primary school students ’computing ability. It is the basis of calculating, estimating and calculating conveniently. It has the characteristics of less time, more form, more capacity and faster speed. It is a good way to cultivate students’ sense of number. Mouth arithmetic seems simple, but in reality it is difficult to grasp. that