课本中有些例题属于双基性例题,它主要是起巩固基本概念或公式,形成基本技能的作用.它形式简单,内容单一,但适当变式、延展,也会起到整合知识、归纳方法、培养技能、发展思维的作用.下面以《整式乘法与因式分解》中的两道例题为例,谈谈如何用“小题目”挖掘“大题材”.原题1:(苏教版教材七下第78页例题5第(1)题)计算:(x-3)(x+3)(x2+9).【说明】这是一道计算题,两次运用平 Some examples in the textbook belong to bimonthly examples, which mainly serve to consolidate the basic concepts or formulas and form basic skills. It is simple in form and simple in content, but appropriate variations and extensions also play an integral role in integrating knowledge, inducing methods, Training skills, the role of development thinking below to “integer multiplication and factorization” in the two cases as an example, talk about how to use “small topic ” mining "big subject Teaching sample seven under page 78 of Example 5 (1)) Calculated: (x-3) (x +3) (x2 +9). [Description] This is a calculation problem,