A rope, the first cut 38, the second cut 14, there are 24m left, how long is this rope?

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• 1. A rope, the first minus 38, the second minus the remaining 15, there are still 24 meters, how long is this rope?
• 2. As shown in the picture, the gold medal used in Beijing Olympic Games has a diameter of 70mm, the diameter of the center circle is 30mm, and the width of the gold medal's border is 5mm. Can you calculate the area of the ring-shaped jade wall inlaid on the back of the medal?
• 3. A project, Party A and Party B cooperate to complete in 8 days. Party A did it alone for 6 days, Party B did it alone for 5 days, a total of 27 / 40 of this project. If this project is done by Party A alone, how many days will it take to complete?
• 4. In the first half of 2004, China imported about 18.04 million tons of steel, accounting for 39 / 40 of the steel imports in the first half of 2003
• 5. In a 12 cm long, 6 cm wide rectangular piece of paper, cut a 1 cm radius disc, you can cut up to () discs
• 6. 1. Three out of eighty-six / one out of eighty-seven 2. An engineering team built a highway. 38m in the first day, 42m in the second day. The second day more than the first day was 1 / 28 of the total length of the road. How many meters in the total length of the road? How many parts of the road were built in the two days 3. Two jackets with the original price of 1200 yuan were sold in the shopping mall. It is known that one of them earned 1 / 5 and the other lost 1 / 5. What are the current prices of these two jackets? (there must be a formula, and you'd better answer it) 4. There are two boxes of fruit. 3 / 5 of the weight of box a is equal to 3 / 4 of box B. what is the weight of Box B? (write the answer directly) 5. To make a part, it takes 5 minutes for a, 7 minutes for B, and 1 / 4 of every minute for C. among the three people, () is the most effective 6. Read a science and technology book, read 1 / 6 of it every day, and finish 1 / 2 of the book in () days 7. When the value of x equals () or (), X2 = 6x 8.1/30 + 1 / 42 + 1 / 56 + 1 / 72 + 1 / 90 Those who answer all the above questions will consider adding! /On behalf of the division sign, answer to mark the question number!
• 7. How many grams of water should be evaporated from 20% salt water 80 Kerry to make 50% salt water
• 8. There are three classes in grade six. Class one accounts for 25% of the total number of the three classes. The ratio of class two to class three is 8:7, and class one is 24 less than class two Q:
• 9. Among the three classes in Grade 6, class 1 accounts for 25% of the total number of the three classes, and the ratio of class 2 to class 3 is 7; class 8 is 24 heads less than Class 3, Among the three classes in Grade 6, the number of class 1 accounts for 25% of the total number of the three classes, and the ratio of class 2 to class 3 is 7; 8 the number of class 1 is 24 less than that of class 3. What is the number of class 6
• 10. There are three classes in grade six. Class one accounts for 25% of the total number of the three classes. The ratio of class two to class three is 7:8, and class one is 24 less than class three There are three classes in grade six. Class one accounts for 25% of the total number of the three classes. The ratio of class two to class three is 7:8, and class one is 24 less than class three. How many students are there in grade six? It takes six hours for the express train to go from station a to station B, and 10 hours for the local train to go from station B to station a. the two trains are facing each other at the same time. When they meet, the express train runs 225km, and how many kilometers are there between the two stations?
• 11. A rope, the first minus 38, the second minus the remaining 15, there are still 24 meters, how long is this rope?
• 12. For a rope, cut 25% in the first time, and cut 5 meters less in the second time than in the first time. This is 25 meters left. How many meters are there in the whole court?
• 13. For a rope, 20% of the total length is used for the first time, and half of the total length is used for the second time, with 4.5m left. How long is the rope?
• 14. Fill in the question mark according to the rule
• 15. This is the question 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9. + 100 =?
• 16. If 1 = 5, 2 = 6, 3 = 7, 4 = 8, then 5 =? Answer Such as the title
• 17. What's the next number?
• 18. Mathematics problems (fractional equation) Set up fractional equation to solve the problem: the design speed of Fuzhou Third Ring Road is 80 per hour. It is known that the distance between a and B is 20 km. Xiao Zhang walks along the Third Ring Road at an average speed of 80 per hour, which is 15 minutes shorter than the original speed. Find out Xiao Zhang's original speed. (the distance between a and B is 20 km when taking the original road and the third ring road.)
• 19. There are 140kg flour in two bags a and B. If 12.5% of the flour in bag a is put into bag B, the weight of flour in the two bags will be the same. How many kg flour are there in the two bags? (please list the detailed formula and use the equation to solve it) ≮ if you answer this question within 3 days,
• 20. 1. For a project, team a will do it alone for 15 days, team B will do it alone for 20 days, team a will do it alone for 5 days, and team a and team B will do it together for several days. A total of 4 / 5 of the whole project will be completed? 2. The task of processing a batch of parts directly from one car is completed by the first group in 20 days, and by the second group in 30 days. Now, it is done by the second group for 6 days, and then by the combination of one and two for 3 days. The rest is completed by the first group. How many days will it take? 3. For a pond, it takes 20 hours to operate a single pump, 30 hours to operate B single pump, and 15 hours to operate C single pump?