高小算术第三册仍沿用去年的版本，现就计算时间问题、简单的分数和小数三个部分提出在教学中的几点意见。一、计算时间的应用题计算时间的应用题按照算法可分为三种类型：（1）已知事情开始的时间和终结的时间求经过的时间； The third edition of High School Mathematics still uses the last year’s version. Now, several points in the teaching of time are given in terms of calculation time, simple points and decimals. First, the application of the calculation time The application of the calculation time can be divided into three types according to the algorithm: (1) Knowing the time of the beginning of the event and the time of the end seeking the elapsed time;