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照本宣科的教学,往往使学生思想僵化。让学生“跳一跳去摘果子”的教学,则可以激发学生的学习兴趣,有利于培养学生的创造思维。一题多变,是进行这种类型教学的一下重要方式。 一、式题教学中的一题多变 比如这样一道分数、小数混合四则运算题:3 3/4-0.83+1 2/5,由于题中的分数能化成有限小数,因而把分数化成小数再计算比较方便。但若把式中数据略作变动,使之成为:3 3/4-0.83+1 1/4,或者3 3/4-
According to the teaching of syllabus, often make students think rigid. Allow students to “jump to pick fruit” teaching, you can stimulate students interest in learning, help to develop students' creative thinking. A changeable topic is an important way to teach this type of teaching. First, the problem-based teaching of a problem such as such a change, such as a fraction of the fractional mixed four arithmetic: 3 3 / 4-0.83 + 1 2/5, because the question of the scores can be turned into finite decimal, so the score into decimal Calculate more convenient. However, if the data in the formula is slightly changed to make it 3 3 / 4-0.83 + 1 1/4 or 3 3 / 4-