培养运算能力是数学教学的目的之一。运算技能的形成是不断运用运算法则经过多次合理的练习而实现的。衡量运算技能的标志,是看运算的准确度、速度、灵活性和意识到运算法则的清晰程度。在教学实践中,我是这样培养学生的运算能力的。一、运算首先要正确。概念清楚、运算法则理解准确是运算正确的基础。因此,在把概念讲清楚的前提下,要讲法则、公式的推导过程,一般不要直接地只给出结论。例如,在讲对数运算法则 log_(a)M·N=log_(a)M+log_(a)N 时,要讲推导过程: Cultivating computing ability is one of the goals of mathematics teaching. The formation of computational skills is achieved through the constant use of algorithms through many reasonable exercises. The hallmark of computing skill is to look at the accuracy, speed, flexibility, and clarity of the algorithm. In the teaching practice, I cultivate the students’ arithmetic ability in this way. First, the operation must be correct. The concept is clear, and the algorithm understands that accuracy is the basis for correct operation. Therefore, under the premise of clarifying the concept, we must talk about the process of derivation of rules and formulas, and generally do not directly give conclusions. For example, when we describe the logarithm algorithm log_(a)M·N=log_(a)M+log_(a)N, the derivation process is: