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在一年级数学计算教学中,所有的学生对10以内的减法计算比较容易掌握,相应的解题速度也比较快。刚刚学习计算就给他们带来了不尽的快乐和信心。计算教学逐步深入到十几减几并且被减数个位比减数小的计算题时,教师的耐心讲解使许多学生学会了用教材提示的“破十法”解决这种问题。为着以后学生学习借位减法,教师也必须重点讲解“破十法”。但是经过教师多次讲解后仍有个别学生有些懵懂,这该如何是好?其实教师可以积极联系生活实际举例,比如对于13-7这样的式子,可联想到有位小朋
In the first grade mathematics teaching, all students are less likely to grasp the subtraction within 10, the corresponding problem-solving speed is faster. Just learning to calculate gives them endless happiness and confidence. Computational teaching gradually deepened to a dozen minus a few and was a few bits less than the number of calculations, the teacher’s patience to explain so that many students learn to use textbooks tips “broken ten law” to solve this problem. For future students to learn borrow subtraction, teachers must also focus on “broken ten method ”. However, after many explanations by teachers, there are still some individual students who are ignorant. How can this be true? In fact, teachers can actively contact with examples of life. For example, for such a formula like 13-7, there may be a friend