现在的教学中普遍存在着这样一种现象,对待课本习题总是一带而过,而把主要精力用在了课外习题的训练上.这样做不但增加了学生的负担,而且也不利于培养学生的学习能力.现就人教版七年级(下)的一个习题为例,谈谈利用课本习题开展的教学活动.原题:如图1,AB//CD//EF,则∠A+∠AEC+ Nowadays there is a common phenomenon in teaching that the problem of treating textbooks always passes by, and the main energy is used in the training of extracurricular exercises, which not only increases students’ burden, but also does not help to train students Learning ability. Now on the seventh edition of the PEP (a) exercises as an example, to talk about the use of textbook exercises to carry out teaching activities .. Original title: Figure 1, AB // CD / EF, then + A + ∠ AEC +