What is the correct equation for both questions? The two questions also need to be answered.

I don't know, I don't know, I don't know, I don't know, , don't know, don't know, don't know, don't know, don't know, blame don't know,

Question 3. Let the number of thousands be x, then the number of hundreds is 3x, according to the title: the number of thousands can only be , and the number of hundreds is .

The three-digit number that makes up is . Because it's close to 4000, the three-digit number is 3900.

Question 4. The number of thousands is the largest single digit, so it is 9;

The number in the 10th place is 6 times the number in the 100th place, so the 100th place is 1 and the 10th place is 6;

If the sum of the four digits is 18, then the single digit is: 18-9-1-6=2.

So the four-digit number is 9162.

The results of both courses are correct.

Question 1, 13, 26, 39, that and 4000 is the nearest is 3900

Question 2, the thousand digits 9, the hundred digits and the ten digits can only be 6 and 1, then the inverted single digit 18-9-1-6 = 2, the final 9162

Question 2. According to the topic.

Let this four-digit number be 9000 + 100a + 10b + c, a, all of which are integers. and greater than 0 and less than 10

9+a+b+c=18

b=6a, so 7a+c=, are integers, can be obtained.

c=2,a=

This four-digit number is 9162

You were the first to ask me to look at the computer.

The specific answer formula is shown in the screenshot below

180 divided by 80 plus 100 to get the meeting time is 1 hour. Therefore, when B and C meet, A, B and C travel kilometers respectively, so A lags behind B by 20 kilometers;

The teacher is so boring, why are you doing this question?

The 100th is a willow tree.

Songling Wandering Tree 16 + 1 = 17 17 100 = 17 100 Crape Myrtle 16 2 + 2 = 34 34 100 = 17 feet Reserve 50 willow rollers and 16 3 + 1 = 49 49 100 = 49 100

The area of the triangle = 1 2 * bottom * height, the height of A, B and C is equal, so it is only necessary to examine the proportion of the bottom.

A: B: C = (2+3): 2:3 = 5:2:3 The height of the parallelogram is 9, so it is based on 8, and the long side 10 is tilted, so.

Area = 8 * 9 = 72 square centimeters.

The first one is 20 bar at most = = impossible 5x5 = 25 ......How can people have so many nails that disturb the socks (:

The second one brought 20+20+10 money, ah......Then give the shoot 20+20 to only give the slow 2.

10, because he only has ten nails.

He gave 40 yuan in change.

Xiaohua's father has a total of 10 nails, so it takes a total of 1+1=2 minutes, and because it is in five minutes, a total of 5+5=10 can be cut.