Ding Ding climbed the stairs, and it took him 12 seconds to climb from the first floor to the third floor. According to this calculation, how many seconds did it take to climb from the first floor to the eighth floor? It takes 42 seconds to climb from the first floor to the eighth floor.

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.