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有些具有一定难度、数量关系复杂、算理不容易理解的题目,单独出示,学生解答起来困难,但把它放入一个结构与算理相同的题组,由易到难、由简到繁依次出示,解答起来就比较容易,例如: 1.一项工程由甲乙两个工程队合做4天可以完成,由甲工程队单独做6天可以完成,如果由乙工程队单做多少天可以完成? 2.一笔钱买套装可以买4套,单买上衣可以买6件,单买裤子可以买几件? 3.一批糖果,分给幼儿园的大小两个班,每人可得4粒,正好分完。只分给大班儿童,每人可得6
Some have a certain degree of difficulty, the number of complex relationships, arithmetic is not easy to understand the topic, presented separately, students difficult to answer them, but put it in a structure and the same problem group of arithmetic, from easy to difficult, from simple to complex order For example: 1. A project should be completed by two engineering teams A and B. Four days can be completed by a single engineering team. If the project team alone can do many days ? 2. A sum of money to buy a suit can buy 4 sets, buy a shirt can buy 6, buy a pair of pants can buy a few? 3. A group of candy, divided into two classes of kindergarten size, each can have 4 , Just finished points. Only assigned to large classes of children, each person can get 6