![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
The two passenger and freight cars of Party A and Party B start at the same time. When they meet, the distance ratio of the two cars is 6:5. After meeting, the freight car is 12 kilometers faster than the passenger car per hour. At last, the two cars arrive at the other side's starting point at the same time. It takes 12 hours for the freight car to complete the whole journey. How many kilometers is the distance between Party A and Party B?
Analysis: two cars arrived at the same time, and it took 12 hours for truck B to complete the whole journey, so bus a also took 12 hours. From the title, we can see that the speed of bus a is the same, but after meeting, it takes the same time because it arrives at the same time, and the distance ratio of Party A and Party B is 5:6, so the speed ratio is 5:6, After meeting, the speed of B is y + 12 12Y = x (the speed of a multiplied by time equals the distance) (y + 12) / y = 6 / 5 (the speed of B is 6:5 faster than that of a) y = 60 x = 720
Use 1,2,3,4,5,6,7,8,9 to form three three digit numbers (each number is used only once), so that the largest three digit number is divided by 3 and the remaining 2 is as small as possible; the second largest three digit number is divided by 3 and the remaining 1; the smallest three digit number can be divided by 3. Then, what is the largest three digit number?
347
two hundred and fifty-six
one hundred and eighty-nine
The biggest is 347
The numbers of - 3 and 2 - 5 and - 40 and - 7 - 0.5 and - 1.56 and - 60 and 8 were compared
0 is less than all positive numbers, so 0-7
Negative numbers are less than positive numbers, so - 3-6
The greater the value after the minus sign, the smaller the number, so - 5-1.5
RELATED INFORMATIONS
- 1. >How to compare the size of two numbers_ Primary school mathematics: the order of numbers and comparative size
- 2. Number theory in grade six of primary school The 999 numbers of 1234... 999 are evenly arranged in a big circle, counting from 1: cross out 23 every 1, cross out 56 every 4... So cross out two numbers every other number, and circle them. Question: which number is left? Why? Process
- 3. Say what each step is Mr. Liu took 1100 yuan from the bank. There are two denominations of 100 yuan and 50 yuan. Among them, the number of 100 yuan is 3 / 5 of 50 yuan? Kneel down!
- 4. The charge standard of a city's internal telephone is: 0.2 yuan for the first three minutes (less than 3 minutes is calculated as 3 minutes), and 0.1 yuan for every one minute after that; the charge standard of long-distance telephone is: 0.08 yuan for every 10 seconds (less than 10 seconds is calculated as 10 hours). Xiao Ming made several calls one day continuously, and paid 2.04 yuan in total. How many minutes did Xiao Ming make the most calls
- 5. Use the three numbers 2, 4 and 8, and then add a () or () or () to form a proportion. Write the proportion with the largest ratio
- 6. The ratio of these four numbers is () A.15 to 3 equals 5 to 9 B.3 to 15 equals 9 to 5 c.15 to 9 equals 5 to 3
- 7. Formula: there are () numbers that can be proportional to 3, 4 and 6, the largest of which is (). How to write the formula? There are () numbers that can be proportional to 3, 4 and 6, the largest of which is ()
- 8. Judge the proportion of the four numbers in the following group and write down the proportion 0.2,0.8,4,0.4 2/3,1/3,1/10,1/5 1.5,1/4,1,6 3,5,8,4 3/8,5/8,6,10 1.6,6.4,2,5 A few write a few
- 9. What are the methods to judge whether the four numbers are proportional
- 10. Among the ten numbers from 0 to 9, choose any four numbers to form the maximum number and the minimum number. For example, choose 1, 3, 7 and 8, and the maximum number is 8731 The smallest number is 1378. Then subtract the two numbers, and recombine the four numbers of the result into a maximum number and a minimum number, and subtract them again. "8731-1378 = 73537533-3357 = 4176" in this repeated process, can you find a mysterious number?
- 11. Choose four numbers from 1, 2, 4, 8 and 16 to form a proportion. How many can be grouped
- 12. Add a number to the three numbers 12, 8 and 6 to form a proportion. The number may be (), () or ()
- 13. 2,3,8 and () can form proportions. 1,22,53,12
- 14. 2:4 And 0.4:0.8
- 15. Use 2,16,4,8 to form four different proportions
- 16. 1:40: 2 / 3: 12 cm: 14.4 cm
- 17. It is known that the two external terms of a proportion are 3 and 1 / 4 respectively, and the ratio of the two ratios of a proportion is 1 / 2, which is ()
- 18. Write two ratios of 2 / 3, the ratio of () and () is ()
- 19. Find the ratio of 64:40 3 / 4:0.68 1 / 4:3
- 20. Using 3 / 1, 5 / 2, 25 and 30 as the four items of proportion, how many different ratios can you form? Please write down these ratios