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At the school sports meeting, in the 200m sprint, Xiaoqiang took 2 / 3 minutes, Xiaogang took 50 seconds and Xiaoming took 0.6 minutes. Which of them is the fastest?
Xiaoqiang: 2 / 3x60 = 40s
Xiaoming: 0.6x60 = 36s
∵36s＜40s＜50s
So Xiao Ming runs the fastest
You can also calculate speed by dividing distance by time
On tree planting day, Xiao Ming, Xiao Gang, Xiao Dong and Xiao Qiang go to plant trees together. Every three people plant a tree. How many different planting methods are there?
One: Xiaoming, Xiaogang, Xiaodong. Xiaogang, Xiaodong, Xiaoqiang. Xiaodong, Xiaoqiang, Xiaoming. Xiaoqiang, Xiaoming, Xiaogang
Xiaoming is obliged to plant 15 trees, X less than Xiaogang（
How many 15 + X trees have Xiaogang planted
A natural number is smaller than 10. It is a multiple of 2 and has a factor of 3. The natural number is ()
A. 9B. 3C. 8D. 6
It is a multiple of 2, has a factor of 3, and is smaller than 10. It must satisfy the number of bits 0, 2, 4, 6, 8, and only 6 matches
Xiao Ming and Xiao Li play with scissors, stone and cloth. What's the probability of both of them coming out
1/3*1/3=1/9
There is a rectangular sheet of iron 40 cm in length and 20 cm in width. Please use it to make a 5 cm deep rectangular sheet iron box without cover (welding joints are ignored). How many welding methods do you have? What is the maximum volume of the tin box you made?
As shown in the figure: (1) (40-5 × 2) × (20-5 × 2) × 5 = 30 × 10 × 5 = 1500 (ML); (2) (40-5) × (20-5 × 2) × 5 = 35 × 10 × 5 = 1750 (ML); (3) (40-5 × 4) × 20 × 5 = 20 × 20 × 5 = 2000 (ML); answer: there are three welding methods, and the maximum volume of the tin box is 2000 ml
There is an operation symbol "*", which makes the following formula hold: 4 ⁃ 8 = 16,10 ⁃ 6 = 26,6 ⁃ 10 = 22,18 ⁃ 14 = 50. Then 8 ⁃ 10 = ()
4※8=4X2+8=16,
10※6=10X2+6=26,
6※10=6X2+10=22,
18※14=18X2+14=50.
8※10=8X2+10=26
9720 square meters=______ Hectare & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 0.3 hectare=______ Square meters 15.32 square meters=______ Square meter______ Square centimeter 0.36 square meter=______ Square decimeter=______ Square centimeter 7 square meter 5 square centimeter=______ Square centimeter
(1) 9720 square meters = 0.972 hectares; (2) 3 hectares = 3000 square meters; (3) 15.32 square meters = 15 square meters, 3200 square centimeters; (4) 0.36 square meters = 36 square decimeters = 3600 square centimeters; (5) 7 square meters, 5 square centimeters = 70005 square centimeters
There are 180 books in class 6 (4), of which one third are fairy tales, two fifths are science and technology books, and the rest are comic books
180×（1-1/3-2/5）=48
Find the sum of the first 10 terms of the arithmetic sequence: - 1,2,5,8?
125
RELATED INFORMATIONS
- 1. Xiao Ming and Xiao Gang collect digital cards. Xiao Ming's cards account for 16 / 11 of the total. If he gives 15 cards to Xiao Gang, they will have the same number. How many cards do they have in total?
- 2. A school logistics staff to a stationery shop to buy test stationery bags for ninth grade students, stationery shop rules a purchase of more than 400, can enjoy a 20% discount. If you buy a ninth grade students, can not enjoy a 20% discount, need to pay 1936 yuan; if you buy 88, can enjoy a 20% discount, also only need to pay 1936 yuan. How many ninth grade students in the school ？
- 3. Xiaoying and several students went to the stationery store to buy exercise books. The stationery store stipulated that if the purchase reached a certain quantity, they could buy them at the wholesale price. So they gathered together 60 yuan to buy them at the wholesale price. In this way, the number of exercise books purchased was 30 more than that purchased at the retail price. If the wholesale price of each exercise book was 45 times of the retail price, what was the retail price of each exercise book How much is it?
- 4. A supermarket used 80000 yuan to purchase a batch of "T-shirts" from other places. Due to the good sales, the supermarket urgently allocated 176000 yuan to purchase "T-shirts" which are twice as much as the last time. However, the second purchase price is 4 yuan more than the first purchase price. The supermarket sells them at 58 yuan per piece, and the remaining 150 pieces are sold out at a 20% discount. How much money has the supermarket made in this business (including two purchases)?
- 5. Every day, the supermarket bought back a batch of T-shirts from other places with 50000 yuan. Due to the good sales, the mall urgently allocated 186000 yuan to buy back T-shirts that were twice as much as the first time. However, the second time was 12 yuan more expensive than the first time. The mall sold them at the price of 80 yuan. In order to shorten the inventory time, the last 400 T-shirts were sold out at a discount of 6.5% How much is the profit of the Communist Party of China?
- 6. In order to promote a product priced at M yuan, supermarket a, supermarket B and supermarket C cut prices by 20% twice in a row, 40% at a time in supermarket B, 30% at the first time in supermarket C and 10% at the second time. At this time, the most cost-effective supermarket for customers to buy this product is () A. A B. B C. C D. B or C
- 7. In order to promote a commodity with the same price, supermarket a, supermarket B and supermarket C cut prices by 20% twice in a row, 40% at a time in supermarket B, 30% at the first time in supermarket C and 10% at the second time. Which supermarket is more cost-effective for customers to buy this commodity A. B. B. C. C. D
- 8. I bought a pen, notebook, stationery and schoolbag in the mall
- 9. The stationery store bought 100 pens at the price of 4 yuan each, and each pen was sold at 6 yuan. When some pens were sold, the remaining pens were sold at a 10% discount. When all pens were sold, the store made a total profit of 188 yuan. How many pens were sold at a 10% discount? Don't use the equation, but use the formula
- 10. Buy 3 pens in a stationery shop and get 2 free pens, 4 yuan each. How much should I pay for 12 pens?
- 11. It took Xiaoming 18 seconds to run 100 meters and Xiaogang 24 seconds to run 150 meters. Who runs fast? process
- 12. Xiao Gang and Xiao Ming are in the 100 meter race. When Xiao Gang runs 80 meters, Xiao Ming is 40 meters away from the end. Then when Xiao Gang runs to the end, how many meters is Xiao Ming away from the end?
- 13. The mathematics interest group held a test. There were 15 questions in the whole paper. It was stipulated that 8 points would be deducted for each right question and 4 points would be deducted for each wrong question. Xiaoying got 72 points in total, and she did it right______ Question
- 14. The mathematics interest group held a test. There were 15 questions in the whole paper. It was stipulated that 8 points would be deducted for each right question and 4 points would be deducted for each wrong question. Xiaoying got 72 points in total, and she did it right______ Question
- 15. Xiao Ming went to school from home. After walking at the speed of 50 meters per minute for two minutes, he found that he would be 8 minutes late if he walked at this speed Xiao Ming went to school from home. He walked at a speed of 50 meters per minute for two minutes. He found that he would be 8 minutes late if he walked at this speed. So he accelerated his pace and walked 10 meters more per minute. As a result, when he got to school, he had five minutes to go. What's the distance between Xiao Ming's home and school?
- 16. When Xiao Ming reads a book, the number of pages he has read is 32 of the number of unread pages. When he reads another 30 pages, the number of pages he has read is 73 of the number of unread pages. How many pages are there in this book?
- 17. Help me solve a math problem and answer it in a minute! When Li Mengmeng read a book, he read one third of the whole book on the first day, and 18 pages more than 25% of the whole book on the second day. At this time, the ratio of the number of pages read to the number of pages not read is 3:1. (1) how many pages are there in the book? (we can't use equations to solve it, we must use equations) (2) how many pages did he read the next day?
- 18. The circumference of a cuboid is 80cm, and the ratio of length to width is 4:1. What's the area of the cuboid? Tao Jie and Jiang Tao travel from a to B at the same time, and their speed ratio is 4:3. Tao Jie travels 20 kilometers per hour, and Jiang Tao travels how many kilometers per hour?
- 19. Master Wang made a light box with 78.5 square centimeters of openings in the middle of the top and bottom. How much colored paper did he use? 20cm in diameter
- 20. Baidu asked Xiaoming to do math problems, each right one plus 10 points, do a wrong deduction of 5 points, a total of 10 questions, the final 55 points ask right and wrong each several questions extra urgent