一、通过梯级练习培养抽象和概括能力新授课的巩固练习要遵循以下思维规律 ,先出示基本题 ,让学生模仿一般的解题规律 ,巩固新知识 ;再出示稍有变化的习题 ,让学生摆脱模仿 ,抓住事物的本质属性 ,合理安排一些同类事物的的综合练习题和富有思考性的习题。例如 :在教分数乘法应 First, cultivate abstraction and general abilities through cascade exercises Consolidation exercises for new lectures should follow the following rules of thinking, first show the basic questions, let the students imitate the general problem-solving law, to consolidate new knowledge; then produce a slightly changing exercises to allow students to get rid of Imitate, seize the essence of the nature of things, reasonable arrangements for some of the same type of comprehensive exercises and thought-provoking exercises. For example: to teach fractional multiplication should be