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我在小学教学中,十分注意学生解答应用题的能力。在已知条件上找出要求的问题我经常向学生提出两个已知条件,启发他们从两个已知的同类量上找出要求的问题。如:“张师傅每天生产零件50个,李师傅每天生产零件40个。启发学生思考,“象这样的两个已知条件,能求些什么问题?”学生作了以下回答:①张、李两个师傅一天共生产零件多少个;②张师傅每天生产的零件比李师傅的多多少个;③李师傅每天生产的零件比张师傅的少多少个;④张师傅每天生产的零件是李师傅的多少倍;⑤李师傅每天生产的零件是张师傅的几分之几。我再问学生:还能求些什么问题?学生回答不能。接着我小结:“因为四则运算中的和、差、包含除法(即倍比关系)都是反映的同类量之间的数
In primary school, I paid great attention to the ability of students to answer the questions. Finding the Requirements on Known Conditions I often present two known conditions to my students that inspire them to find the requirements from two known quantities of the same type. Such as: “Master Zhang daily production of parts 50, Lee master daily production of parts 40. Inspire students to think,” like two of these known conditions, what can be asked? “The students made the following replies: Zhang, Li The number of parts produced by the two masters a day a total of how many parts; ② Zhang master daily production of parts more than the number of Master Li; ③ Master Li daily production of parts less than the number of master Zhang; ④ Zhang master daily production parts are Master Li How many times; ⑤ master Lee daily production of parts is a fraction of the master Zhang I ask the students: What can I ask? Students can not answer.And then I summary: ”Because the four operations and the poor, Contains the division (ie, multiples) are reflected between the number of similar categories