Xiaohua s family lives on the 4th floor, and it takes 15 seconds to go upstairs every time, and how

For this question, 15 4 9 is equal to. So it takes seconds to get up to the 9th floor at the same speed.

Xiaohua's family lives on the 4th floor, in fact, he went up to 3 floors, because the first floor does not need to climb the stairs, with 15 seconds, then the time he went up to the next floor is 15 3 = 5 seconds, in the same way, to the 9th floor, he actually went up 8 stairs, 8 * 5 = 40 seconds, so it took him 40 seconds to climb to the 8th floor.

Xiaohua's family lives on the 4th floor, and it takes 15 seconds to stand each time, and with the same speed, it will take about 20 seconds if it is 3 9 degrees, because he has the same speed, and it will take about 20 seconds to run up to the 9th floor.

I think I should go up to the ninth floor at the same speed. It takes about 34 seconds or so.

Going up to the fourth floor, he actually went up three floors, because the first floor doesn't have to walk, so he used 15 seconds for the three floors, and five seconds for each floor, and then he needs to walk eight floors now, and then it takes 40 seconds.

Hello, if this is the case, it will be faster to do it, and then every time it takes 15 seconds to go up to the ninth floor, it should be 15 9, and then add about half a minute, because it will run slower and slower.

There are two knowledge points in this question.

You have to know that if you live on the fourth floor, you need to climb three floors.

If you live on the ninth floor, you need to climb eight floors.

The time it takes to pick up a floor is 15 3 = 5 seconds.

Then if you climb to the ninth floor, it will take 5 8 = 40 seconds.

The correct algorithm for this problem is to divide 15 by four. The resulting result is further multiplied by eight. That's 30 seconds.

If he had gone up to the ninth floor at the same speed, he would have had 40 seconds. Temporal.

Solution: According to the meaning of the question.

40 (seconds) Answer: It takes 40 seconds.

This one is very simple, we use 15 4=, we use it at least seconds.

If it takes a different amount of time to go upstairs, you can go to the toilet.

Xiaohua's family lives on the 4th floor, and it takes 15 seconds to go upstairs every time, so it takes about 5 seconds on each floor.

It takes 8 times to get to the 9th floor for a total of 40 seconds.

The Hua family lives on the fourth floor, and it takes 15 seconds to go upstairs each time, and it takes 40 seconds to go up to the ninth floor at the same speed, because it takes five seconds for each floor.

Xiaohua's family lives on the fourth floor, and if it takes 15 seconds to go upstairs every time, and he uses the same speed to go up to the 9th floor, then it should take him two minutes.

15÷（4-1）x（9-1）=40

Xiaohua's family lives on the 4th floor, and it takes 15 seconds to go upstairs every time, and it takes 40 seconds to go up to the 9th floor at the same speed.

What exactly do you want to ask, ask the question in detail.

Xiaohua's family lives on the fourth floor, and it takes 15 seconds to go upstairs every time, and how many seconds does it take to go up to the ninth floor at the same speed? It takes up to 25 seconds.

Xiaohua's family lives on the 4th floor, and it takes 15 seconds to go upstairs each time, and it takes time to go up to the 9th floor at the same speed.

15/（4-1）x（9-1）

5x840 seconds.

12 (3-1) = 6 (seconds).

6 (8-1) = 42 (seconds).

A: It takes 42 seconds.

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100 seconds. According to the mathematical conversion, Xiao Ming took 40 seconds to go from the 1st floor to the 5th floor, and the time to walk each staircase Xinfanchang: 40 (5-1)=10 (seconds), and the 11th floor:

10 (11-1) = 100 (seconds), so it takes 100 seconds to get from the 5th floor to the 11th floor.

=9 (hole and virtual second).

45 (seconds shed lee).

A: It takes 45 seconds to walk from the 1st floor to the 6th floor

From the 2nd floor to the 4th floor of the acre, I actually climbed 2 floors and burned branches, 3 4, and it took 24 seconds, and each floor took 24 2 = 12 seconds.

From the first floor to the sixth floor, you actually climbed five floors, which is 5 * 12 = 60 seconds.

Since there are a total of 7 stairs to climb from the first floor to the eighth floor, each staircase takes 7 7 = 1 minute.

So from the first floor to the third floor, it is 1 2 = 2 minutes, which is 2 7 to the 8th floor.

According to the inscription, it is known that it took 7 minutes to go up from the first floor to the eighth floor. At this rate, you need to find out how many fractions of the time from the 1st floor to the 3rd floor is the time from the 8th floor, and the detailed process is as follows:

Answer: The time he went up from the 1st floor to the 3rd floor was 2 7 when he went up to the 8th floor

From the 1st floor to the 3rd floor, up: 3-1 = 2 floors.

From the 1st floor to the 6th floor, up: 6-1 = 5 floors.

5x54÷2-54

5x27-2x27

27x(5-2)

3x2781 seconds.

A: It takes 81 seconds to go up to the 6th floor.

From the first floor to the third floor, there are two floors, which means that it takes 54 2 27 seconds to go up to the next floor. It takes 27 3 81 seconds to go up three floors from the third floor to the sixth floor. So it will take another 81 seconds.

From the first floor to the third floor, it takes 54 seconds to go up to two floors, and 27 seconds for each floor. Going up to the 6th floor is the third floor, which should take 81 seconds.