Five eighths of a ton can be regarded as not only a fraction of five tons, but also five eighths of a few tons? Mainly the first question,

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• 1. The number of the first team is 9 / 10 of the number of the second team, and the number of the second team is 2 / 3 and 1 / 3 of the number of the third team. What percentage of the total number of the three teams?
• 2. Xiaohua finished two fifths of a story book on the first day, nine tenths of it on the second and third days, and what percentage of the total on the second day Xiaohua read a story book. In the first two days, she read two fifths of a story book. In the second three days, she read nine tenths of a story book. In the second day, she read a few of the story books
• 3. There are several first, second and third prizes in the contest. 1 / 2 of them win the first and second prizes, 8 / 9 of them win the second and third prizes, and some of them win the second and third prizes
• 4. The ratio of boys to girls in class 6 (1) is 9:7. Boys account for & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; (& nbsp; & nbsp;); girls account for & nbsp; & nbsp; & nbsp; & nbsp; (& nbsp;)
• 5. Divide 3 tons of goods into 8 parts on average. How many parts of the total goods are each and how many tons are each?
• 6. Arrange the 96 pieces according to --- 0 0 ‰ --- 0 0 ‰ ·..., --- how many parts of the total number, ○ how many parts of the total number, ● how many parts of the total number
• 7. There are several first, second and third prizes in the "June 1" talent show. The first and second prizes account for 12% of the total number of winners. The second and third prizes account for 45% of the total number of winners. What percentage of the first, second and third prizes account for?
• 8. What percentage of the world's population is China's? By the way, give me "what is the number of water sources per capita in China compared with that in the world?"?
• 9. What percentage of the world's population is China?
• 10. How many parts of the world's ethnic groups are there in Asia
• 11. 30 minutes = a few minutes, 1 hour = a few days
• 12. Build a road of 8 kilometers, complete 1 / 3 on the first day, and how many parts of the total length are left?
• 13. 35% of the total length of a highway has been built, and the rest is full length______ What has been repaired is the rest______ The rest is repaired______ ．
• 14. To build a highway, 5 / 8 of its total length has been built. What has been built is the rest. What is left is the rest. What is left is the rest of its total length
• 15. A section of the road is 5 kilometers in total. We need to finish it in 8 days. How many kilometers per day? How many parts of the total length are repaired every day?
• 16. To build a road, the length of the repaired road is two fifths of the length of the unfinished road. Who should be regarded as unit 1? What is the proportion of the length of the repaired road to the total length?
• 17. 9 / 5 = () / () 4 / 7 = () 8 / 8 = () = () 60 kg = a few tons 43 seconds = a few minutes 9:00 = a few days Give a 4 kg bag of candy to 7 children on average. How many parts of this bag of candy is () kg per person
• 18. Divide 5kg into 8 parts, each part is a few parts of 5kg
• 19. 8 out of 12
• 20. 68% = ()% = (): () = fraction