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第十一册工程问题的明显特点是工作总量和效率在题目中均不用实际数量来陈述,在列式计算时工作总量用单位“1”来表示,效率则用相当于工作总量“1”的几分之几的“率”来表示,因此显得更加抽象。学生学习这种问题时,由于受整数工程问题(即工作总量和工作效率均用具体数量表示)认知定势的影响,解题时常常出现模式比的机械套用。如:某工
The eleventh book of the obvious characteristics of engineering problems is the total amount of work and efficiency are not subject to the actual number of statements in the column in the calculation of the total amount of work with the unit “1” to indicate the efficiency is equivalent to the total amount of work “ 1 ”a few of the“ rate ”to express, so it is more abstract. Students learn this problem, due to integer engineering problems (that is, the total amount of work and work efficiency are expressed in the specific number of) the impact of cognitive, problem-solving often appear when the model than the mechanical application. Such as: a work