小学数学第二册中,求两数相差多少的应用题比“求总数”、“求剩余问题抽象,且题中文字叙述形式多变。所以,学生学习困难较大,它既是教材重点,又是教学难点。怎样搞好这一内容的教学呢? (一)先让学生积累感性知识 1.在数的认识中孕伏两数相差多少的知识如教学生认识数4,可用计数器进行直观演示。先拨珠3颗,然后再 Primary Mathematics in the second volume, the difference between the number of two seeking the number of applications than “seeking the total number,” "seeking the remaining problems abstract, and the title of the narrative form of changeable. Therefore, students with greater learning difficulties, it is both textbook focus, and Is difficult to teach .How to do a good job of teaching this content? (A) first let students accumulate perceptual knowledge 1 in the number of understanding pregnant two difference between the number of knowledge such as the number of teaching students 4, the counter can be intuitive demonstration First move the beads 3, and then again