《义务教育数学课程标准》指出:运算能力不仅是一种数学的操作能力,更是一种数学的思维能力。运算的正确、灵活、合理和简洁是运算能力的主要特征。而简算是灵活、正确、合理地运用各种定义、定理、定律、性质、法则等,改变原有的运算顺序进行计算,是计算中最为灵活的一种,它能使计算变难为易,变繁为简,变慢为快。让简算与思维牵手,使学生思维的灵活性得到充分锻炼,对提高学生的计算能力将起到非常大的 “Compulsory education mathematics curriculum standards” that: computing power is not only a mathematical ability to operate, but also a mathematical thinking ability. The correct, flexible, reasonable and concise operation is the main feature of computing power. The simple calculation is flexible, correct, and reasonable use of various definitions, theorems, laws, nature, laws, etc., to change the original calculation order calculation is the most flexible calculation, it can make the calculation difficult as easy, variable Fan Jane, slow down fast. Let the simple calculations and thinking in hand, so that students have the flexibility to think of exercise, to improve the computing power of students will play a very large