四则式题在小学数学教材中占有相当大的比重,在解答量与计量、简易方程、几何初步知识、统计知识以及应用题时,也都离不开计算。算得如何,准不准、快不快、巧不巧直接关系着整个数学知识的学习。一、加强口算能力的培养口算是一种不借助计算工具,仅依靠记忆与思维,直接算出结 Four style questions in the primary mathematics textbooks occupy a large proportion, in the measurement of quantity and measurement, simple equations, geometric knowledge, statistical knowledge and application questions, are also inseparable from the calculation. How, quasi-prospective, fast unpleasant, coincidentally directly related to the entire mathematical knowledge of learning. First, to strengthen the ability to train port count is not a calculation tool, just rely on memory and thinking, calculate the knot