一、教材简析 “九义”小学教学第五册“混合运算和两步应用题”这一单元的内容在编排上作了较大的改进,教师应根据新教材的编排特点进行教学。 1.混合运算。本单元的“混合运算”要求学生初步掌握合有两级运算的运算顺序,会计算比较容易的三步式题。 First, the textbook analysis “Nine meaning” primary school teaching fifth volume “mixed computing and two-step problem” in the content of the unit made a greater improvement in the arrangement, teachers should be based on the new teaching materials choreography characteristics of teaching. Mixed operation The unit's “mixed computing” requires students to initially grasp the sequence of operations with two levels of computation, will calculate the easier three-step question.