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2. A pile of coal is planned to burn 45 kilograms a day, which can burn for 40 days. Because it saves coal, it actually burns for 50 days. How many kilograms of coal are actually burned every day?
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A train with a speed of 75 kilometers per hour departs from A at 9: 00 and arrives at B at 19: 00. How many kilometers is it between A and B?
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4. Build a 324-meter-long road, 240 meters for the first 8 hours, and 2 1 meter for the rest of the time. How many hours will it take to complete?
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I moved 360 books with three classmates. How many books did everyone move?
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6. Xiaoli insisted on writing 36 big characters every day during the summer vacation. How many big characters can she write in August?
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7. Students from Class Three of Grade Three went out to participate in the "I Love Science" activity. Each class is divided into four groups on average, with 14 students in each group. How many students in Grade One participated in this activity?
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8. Xiaoming bought three thermos bottles, 150 yuan, and the shop assistant called 6 yuan. How much is each thermos?
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9. Light light blue attended the summer camp on July 15 and returned on the 9th of next month. How many days does the summer camp last?
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10. A chemical fertilizer plant produces chemical fertilizer 150kg every day. How many kilograms does * * * produce from July to September?
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1 1. Wang Qiang height 148 cm, Xie Ming height 142 cm, Li Lei height 139 cm, Wang Xiaofei height 14 1 cm and Liu Si height/kloc. What is the average height of the choir?
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12. The grocery store delivered 5 boxes of salad oil * * * weight 150kg, each containing 6 barrels of oil. What is the average weight of oil per barrel?
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13. Four classes in grade three of a school donated 576 yuan to the disabled, and each donated 3 yuan on average. How many people are there in each class on average?
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14. This cotton mill weaved 250 kilometers in five days. According to this calculation, how many kilometers can 16 weave in a day?
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15. Xiaohong and Xiaohua jump rope. Xiaohong jumps 6 12 in 6 minutes, and Xiaohua jumps 520 times in 5 minutes. Who jumps faster? How fast?
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16. A bed is 9 meters long and 20 decimeters wide. What is its area?
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17. A square experimental field with a side length of 800 meters, if the rice harvest per hectare is about 8 tons. How many tons of rice can this experimental field harvest?
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18. Lily's living room is 4m wide, and 1m is less than twice as wide.
(1) What is the living room area of Lily's house?
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(2) The side length of this tile is 2dm. If lily uses this tile to decorate the living room, how many pieces does she need at least?
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19. The circumference of a rectangular land is equal to that of a square land. The rectangular land is 30m in length and 10m in width. How many square meters is the square land?
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20. Xiaoming ran around the 200-meter-long rectangular playground, and * * * ran 6600 meters. What is the area of this playground?
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