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分数应用题历来是教学的重难点,学生解题时,往往不知从何下手。教学时,不妨借鉴影视中“慢镜头”的方法,对不同的知识点进行分解,从总体到部分各个突破,帮助学生寻找解题途径。 例:一批零件,原计划按4∶3分配给师徒俩加工。现在师傅加工1200个,超过分配任务的20％,徒弟只完成他所分配任务的2/3,徒弟实际加工多少个零件?
Fraction application questions have always been teaching heavy and difficult, students solve problems, often do not know where to start. Teaching, may wish to learn from the film's “slow motion” approach to the decomposition of different knowledge points, from the general to some of the various breakthroughs to help students find ways to solve problems. Example: A batch of parts, originally planned to be allocated to the master and the teacher by 4: 3 processing. Now master processing 1200, more than 20% of the assigned task, apprentice only completed his assigned task 2/3, apprentice actually processing the number of parts?