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计算能力是一项基本的数学能力,培养小学生的计算能力,是小学数学教学的一项重要任务。而口算是提高计算能力的基础,低年级口算是否达到大纲的要求,将直接影响高年级计算能力的形成。良好的口算能力能提高学生的敏捷性、逻辑性和准确性。学生的口算是从10内数的认识和加减法开始的,20以内数的认识和加减法是基本运算的关键时期,无论是以后学习加、减、乘、除,还是开方、乘方等复杂的计算,都离不开20以内加减法的
Computational ability is a basic mathematical ability to train pupils in computing power, is an important task in primary school mathematics teaching. The calculation of the mouth is to improve the basis of computing power, whether the lower grades meet the outline requirements, will directly affect the formation of senior grade computing power. Good numeracy skills improve student agility, logic and accuracy. The students’ oral arithmetic begins with the recognition and addition and subtraction of 10 numbers, and the recognition and addition and subtraction within the number of 20 are the crucial periods of basic arithmetic. Whether it is learning to add, subtract, multiply, divide, or multiply by Square and other complex calculations, are inseparable from the addition and subtraction within 20