整数、小数和分数的四则计算及其四则混合运算是小学数学的重要内容,是提高解答应用题和几何问题能力的基础,直接影响着学生的智力和非智力因素的发展,要特别做好计算题的复习这一关键环节。 Integer, fractional and fractional calculation of the four and its four mixed computing is an important part of primary mathematics, is to improve the ability to answer questions and geometric problems based on a direct impact on the development of students’ intellectual and non-intellectual factors, to make a special calculation The review of this key link.