A 6-story building with 9 stairs on each floor, Dongdong goes from the second floor to the third floor. How many stairs did you take? How about walking to the sixth floor?

A 6-story building, each floor has 9 stairs, Dongdong walks from the second floor to the third floor, * * * takes 9 stairs, and walks to the sixth floor with 36 stairs.

According to the topic calculation formula:

Go to the third floor: 9x 1=9.

Go to the 6th floor: 9x(6-2)=36.

So from the second floor to the third floor, * * * took nine stairs and took 36 stairs to the sixth floor.

Extended data:

Mixed operation, if the first-level operation and the second-level operation coexist, the second-level operation is calculated first. If there are one, two and three operations at the same time (i.e. power, root and logarithm operations), the third operation is calculated first, and then the other two levels are calculated.

If there are brackets, count the numbers in brackets first (no matter what level, count first) The third level should be counted in brackets, and then the second and first levels should be counted.

What are the necessary algorithms to participate in mathematical modeling?

What is the date of the 2022 postgraduate entrance examination?

All the mathematical symbols

Help me solve this math problem!

English words in primary schools

2022 Tianjin Bohai Vocational and Technical College Spring Examination Admissions Charter

The enrollment charter of Tianjin Bohai Vocational and Technical College in 2022 has been released. The

Mathematical problems of Aabc

What can you do in an hour? What is a handwritten newspaper?

Wu Zhengxian's advice to primary school math teachers.

I didn't do well in the math exam, I was 200 words short.