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分数应用题研究的就是单 位“1”的量、比较量和分率三者 之间的关系。比较量就是与单 位“1”的量相比较的量,分率就 是比较量占单位“1”的量的几分 之几。三种量之间的基本数量 关系是:单位“1”的量×分率= 比较量。在解题过程中,比较量 和分率一定要相对应。学生能 否掌握这一对应思想是正确解 答分数应用题的关键。根据单 位“1”不同的确定方法可将分数 应用题归纳为三种情况:
The fractional application study is the relationship between the amount of the unit “1”, the amount of comparison and the rate of the three. The comparison amount is the amount that is compared with the amount of “1” of the unit, and the fraction rate is a fraction of the amount of the comparison “1”. The basic quantitative relationship between the three quantities is: the amount of units “1” × fractional ratio = comparison amount. In the process of solving problems, comparing the amount and fraction must be corresponding. Students can grasp the corresponding idea is the key to correct answer scores application questions. According to the unit “1” different determination method can be divided into three categories of application questions: