一、相互对应关系思维训练我们知道,学生在解应用题时,很难找准对应数,这是解某些应用题时产生错误的主要原因.如:某队计划三天修完一条1200米长的公路,第一天修了全路的1/3.第二天修了全路的1/4,第三天还要修多少米?正确答此题的关键是教师引导学生弄明白分数与数的相互对应关系.如图所示: First, the mutual correspondence Thinking Training We know that students in the solution of the problem, it is difficult to find the corresponding number, which is the main reason for mistakes in some application problems such as: a team plan to finish a three-day 1200 meters Long road, the first day of the repair of the whole 1 / 3. The day after the repair of the whole 1/4, the third day but also repair how many meters? The correct answer to this question is the key to teachers to guide students to understand the scores and the number The mutual correspondence. As shown: