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人教版七(上)数学第二章第2课时【教学目标】1.理解同类项、合并同类项的概念。2.掌握合并同类项法则,会应用该法则及运算律合并多项式的同类项,会应用同类项及合并同类项解决实际问题。3.感受其中的“数式通性”和类比的数学思想。【教学重点】理解同类项的概念;掌握合并同类项法则。【教学难点】正确运用法则及运算律合并同类项。【教学过程】一、知识链接1.运用运算律计算下列各题。16×20+3×20=26×(-20)+3×(-20)=
PEP 7 (Part 2) Mathematics Chapter 2 Lesson 2 【Teaching Objectives】 1. Understand the similar items and merge the concepts of the same items. 2. To grasp the principle of merging similar items, the same item that applies the law and the polynomial of the operation algorithm will be applied to solve the practical problems by using the same items and merging the same items. 3. Feel the mathematical knowledge of “mathematical continuity” and analogy. 【Teaching】 Understand the concept of similar items; grasp the same items of the same law. Difficulties teaching the correct use of law and the law of consolidation of similar items. 【Teaching process】 First, the knowledge link 1. The use of arithmetic law to calculate the following questions. 16 × 20 + 3 × 20 = 26 × (-20) + 3 × (-20) =