How to answer the reading time of the second grade math test paper? This is usually written down.

Solve the problem:

1, the quantitative relationship of solving problems: elapsed time = end time-start time.

2. Common sense: Write homework and finish it quickly in less time.

3. The quantitative relationship of problem solving: start time = end time-elapsed time.

Error-prone questions:

This question examines the mastery of the timing writing method of electronic watches. The format is "hours: minutes", such as 0 1:23). Numbers less than 10 should start with zero. So this question is wrong. The correct spelling is 12: 05.