30 points = several parts of the time 250 kg = several parts of the ton 125 m = several parts of the thousands of meters 70 g = several parts of the thousands of grams 15 points = several parts of the time 8 cm = fraction of a decimeter 8 cm = a few tenths of a decimeter

8 cm = 4 / 5 decimeter
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1. What fraction of an hour is 25 minutes? Please, thank you
2. 15 minutes = fraction of an hour
3. Five decimeters is a fraction of a meter. 25 minutes is a fraction of two hours Five decimeters is a fraction of a meter. 25 minutes is a fraction of two hours
4. Two hours and 15 minutes is a fraction of an hour
5. An hour and 15 minutes is a fraction of an hour
6. 4 hours 15 minutes = what time 15 minutes = 0.15 * 60 = 9 how to calculate 4 hours
7. Cut the 5-meter-long rope into 8 sections on average. How long is each section? How many parts of each section?
8. Cut a 3-meter-long rope into 4 sections on average, and each section accounts for 3 meters of () (), each section is () () meters, which is 1 meter of () ()
9. Divide an 8 / 9 meter rope into four sections. What's the length of each section? What's the length of each section
10. Divide the 3-meter-long rope into 7 sections. How much is the length of each section? How many meters is the length of each section?
11. 2 and 1 / 2 hours: 50 minutes = (): () = fraction = ()
12. 50 grams more than 25 grams
13. 24 km is 20% more than () km; 15 g is 20% less than () km
14. 20 g is 50 g (), 20 g is less than 50 g (), 50 g is more than 20 g ()%
15. The number of a is 25% less than that of B, and the number of a and B is 82% more than that of a kilogram The number of a is 25% less than that of B, and the number of a and B is 25% less than that of B It is judged that 82% of the number of people with 820 grams per kilogram is 20% of the number of people with a, and the ratio of number B to number a is 1:5 The price of a commodity is reduced by 20% and then raised by 25%. The current price is equal to the original price
16. 820 grams is more than 82% of a kilogram, please
17. A fifth increase in 40g is () g, a fifth increase in 40g is () g, and a few percent decrease in 40g compared with 50g（ A fifth increase of 40g is () g, a fifth increase of 40g is () g, a few percent less than 50g, and () g is 20% more than 40g
18. Again, 20 grams is 37.5% less than 40 grams
19. 400g to 2.5kg
20. Simplification ratio: 15 minutes: 0.3 seconds, 8 cm: 200 meters, 0.8:5.6