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一、教材分析 《连乘应用题》是九年义务教育六年制第八册第一单元《两、三步计算的应用题》中的第一课时,是在学生学习了第六册用两种方法解答的连乘应用题的基础上的进一步拓展。本册的连乘应用题与第六册的连乘应用题不同,其特点是,未知量随着两个量的变化而变化。通过这部分内容的教学,不仅使学生掌握了这类应用题的结构特点,学会用两种方法解答和列综合算式解答,同时也为后面学习复杂归一应用题的教学做好辅垫。 根据大纲的要求和教材所处
First, the textbook analysis “even by the application of questions” is nine years of compulsory education eighth year of the eighth unit first unit “two or three-step calculation of the application of” the first lesson is when students study the sixth book with two The solution to the problem of even multiplication application based on the further expansion. This book Lianliankan problems with the sixth book Lianliankan title is different, which is characterized by unknowns with two changes in the amount of change. Through this part of the content of teaching, not only to enable students to master the structural characteristics of such applications, learn to answer two methods and columns to calculate the answer, but also for the back to learn the complex application of the problem to do a good job cushion. According to the outline of the requirements and teaching materials