论文部分内容阅读
在一次二年级数学测试时,发现三个班学生在解答“36个小朋友去公园划船,每只小船能坐4人,票价20元;每只大船能坐6人,票价25元。坐哪种船比较合算?”这道题时,错误率竟高达70%以上,而且答题方法千奇百怪。究其原因,还是学生不能正确分析应用题里的数量关系,并根据题里的数量关系正确选择运算方法。两步计算应用题在应用题教学中起着承上启下的重要作用,它是一步应用题的延伸和发展,又是后面三步应用题的基础,是学习解答多步应用题的关键。
In a second-grade math test, I found three classes of students answered “36 children go boating in the park, each boat can take 4 people, the fare of 20 yuan; each boat can take 6 people, the fare of 25 yuan. Which ship is more cost-effective? ”This question, the error rate was as high as 70% or more, and the answer method is strange. The reason, or the students can not correctly analyze the relationship between the number of questions, and according to the number of questions in the correct choice of computing methods. Two-step calculation of the application of the problem in the teaching of application plays an important role in supporting, it is a step-by-step application of the extension and development, but also the basis for the next three-step application is the key to learning to answer multi-step application.