《数学课程标准》明确指出:“运算能力主要是指能够根据法则和运算定律正确地进行运算的能力。”为此,简便计算是计算教学的重要组成部分,也是构建数学知识的基础,对提高数学教学质量是至关重要的。而运用运算定律进行简便计算是计算教学的一个难点,值得我们教师不断地去探究与研究。对此,笔者认为计算教学应做到“四问”。一问:讲清计算算理吗?算理的理解,有妙招,即一边算一边口述计算的过程。一边笔算一边口述计算过程,是个有效策略,口述计算过程是一种数 “Mathematical Curriculum Standard” clearly states: “Computing power mainly refers to the ability to correctly operate according to the law and the law of operations.” To this end, simple calculation is an important part of teaching, but also the basis for building mathematical knowledge, To improve the quality of mathematics teaching is crucial. The use of computing laws of simple calculation is a difficult teaching, it is worth our teachers continue to explore and research. In this regard, I believe that teaching should be done “four questions ”. A question: to clarify the calculation of the calculation? Computational understanding, there is coup, that is, while calculating the process of dictation. While calculating the lip-counting process, is an effective strategy, oral calculation is a kind of number