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表内乘法和表内除法(二)是在2—6的乘法口诀和用2—6的乘法口诀求商的基础上教学的。教材注意将有倍数关系的应用题和乘、除法计算穿插编排,既可以使乘、除法计算有比较多的练习时间,又可以突出几种应用题之间的数量关系的联系。同时,教材还注意通过“提问题”和“填条件”,初步训练学生用综合法和分析法思考问题,帮助学生掌握乘、除应用题的结构和解题思路。因为有余数的除法是本单元的教学重点和难点,又是除法的基础,而且试商比表内除法复杂,所以教材把有余数的除法作为一小节独立出现。 一、7、8、9的乘法口诀和用口诀求商
Table multiplication and table division (b) is in the 2-6 multiplication formulas and 2-6 multiplication formulas on the basis of the provider of teaching. Teaching materials will pay attention to multiples of the application of questions and multiplication, division calculation interspersed arrangements, both multiplication and division can calculate more practice time, but also can highlight the relationship between the number of application problems. At the same time, the textbook also pay attention to “raise questions” and “fill conditions”, initially training students to use comprehensive and analytical thinking to help students grasp the multiplication and division, in addition to the structure and problem solving ideas. Because of the division of the remainder is the teaching of the unit focus and difficulty, but also the basis for division, and the trial division than the table division, so the teaching of the division of the remainder as a separate section appears. First, 7,8,9 multiplication formulas and formulas to find business