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求比一个数多几的数的应用题,是一步计算应用题教学中的一个难点。要教好这部分内容,要通过直观,在学生理解“同样多”的基础上,搞清数量关系。五年制小学数学课本第三册第75页,教学时可以先让学生摆小棒,并回答有关问题。如:1.第一行摆3根小棒,第二行摆的与第一行同样多,第二行摆了几根?2.第一行摆3根小棒,第二行先摆的与第一行同样多,再摆2根,第二行共摆了几根?
The number of applications for a few more than the number of questions, is a step-by-step calculation problem teaching a difficult. To teach this part, we should clarify the relationship between quantity through intuition and on the basis of students' understanding of “as much as”. Five-Year Primary Math Textbook, Volume 3, Page 75, students should be given a small stick and answered questions. Such as: 1. The first line put three small sticks, the second line placed as much as the first line, the second line placed a few root? 2. The first line put three small sticks, As much as the first line, then put two, put a few in the second line?