The answer process is as follows:
Climb the stairs from the first floor to the third floor;
3- 1=2 (piece)
Time required for each staircase:
12÷2=6 (seconds)
Climb the stairs from the first floor to the eighth floor;
8- 1=7 (pieces)
Time required:
7x6=42 seconds
A: It takes 42 seconds from the first floor to the eighth floor.
Extended data:
Mathematics application problems in primary schools are usually divided into two categories: simple application problems that can be solved in one step only by addition, subtraction, multiplication and division; Complex application problems that need two or more operations to solve.
Common methods to solve application problems:
1, analysis method: analysis method is a thinking method that starts from the problem sought in the problem and gradually finds out the known conditions necessary to solve the problem.
2. Synthesis method: Synthesis method is a way of thinking that gradually calculates the problem to be solved from the known conditions in the topic.
3. Decomposition method: A complex application problem is decomposed into several basic application problems, from which clues to solve the problem can be found.