1 There are 240 fifth-grade students in xinhua primary school, which is 4/5 of the sixth-grade students. How many students are there in the sixth grade? The distance between a and b is 280 kilometers. Car A left from A to B in the morning, and by noon 12, it had covered 5/7 of the whole journey. How many kilometers has this car traveled? How many kilometers is it from B city? Xiaodong read a 96-page story book. On the first day, he read 1/8, and on the second day, he read 2/3 of the first day. How many pages did you read the next day? On the third day, which page should Xiaodong read? The fruit shop bought 600 boxes of apples. 65438+ 0.5 of the total amount sold on the first day and 3/8 of the total amount sold on the second day. What fraction of the total sales in two days? How many boxes are left? 5. There are 265,438+06 students in the third grade of Hope Primary School, and the number in the fourth grade is 2/9 more than that in the third grade. How many students are there in the fourth grade? 6. In order to green the environment, a city plans to plant 5,400 ornamental trees, and the staff can plant 2/27 of the total on average every day. After 9 days, how many trees are left without seeds? 7. Among the 48 students in the class, 1/3 participated in the extracurricular interest group activities of music and dance, 5/8 participated in the extracurricular interest group activities of painting and calligraphy, and 5 students did not participate in both extracurricular interest group activities. How many students participated in these two kinds of extracurricular interest group activities? 8. The students have gone to the safari park 36 kilometers away from the school for an autumn outing, which has already covered 2/3 of the whole journey. How many kilometers to the destination? 9. The school newly purchased 450 extra-curricular books, the library kept 90 books, and the rest were distributed to the fourth, fifth and sixth grades according to 2: 3: 4. How many books were distributed to the sixth grade? 10, energy-saving lamps, and now the cost of each lamp is 4.6 yuan, which is 3/5 lower than the original. How much did each lamp cost? 1 1. The ratio of old, middle-aged and young employees in a certain unit is 2: 5: 8. There are 60 fewer old employees than young employees. How many middle-aged employees are there? 12. Yihua Computer City has 220 computers. Sell 1/4 on the first day, and leave 4/ 15 on the second day. How many computers did it sell the next day? 13, a rope, cut off13 of the total length for the first time, cut off 4/5 of the remaining rope for the second time, and cut off 26 meters twice. How long is this rope? 14. There is a batch of chemical fertilizers in the warehouse. For the first time, 2/5 of the total chemical fertilizers were taken out, and for the second time,13 of the total chemical fertilizers were taken out, and 12 bags were missing. At this time, there are 24 bags left in the warehouse. How many bags of fertilizer are there? 15, the sum of a, b and c is 1 10, the ratio of a to b is 3: 2, and the ratio of b to c is 4: 1. What's the number of B? 16, an orchard planted 2/9 more trees this year than last year, and planted 220 trees this year. How many trees were planted last year? 17, the store bought 280 boxes of apples, 2/5 more than pears. How many boxes of pears did you bring in? 18, rectangular vegetable field, with a circumference of 200m and an aspect ratio of 3: 2. What is the area of this vegetable field? 19, the worker's uncle built a canal, with a length of 220 meters, which is less than 4/5 of the total length. What is the total length of this canal? 20. Build a highway. After 3/7 of the total length, there is still 1.7km from the midpoint of this highway. How many kilometers is this highway? 2 1, there is a batch of fruits, which are shipped at 1200 kg after selling 2/5 of the original ones. At this time, the fruit is just 2/3 of the original. Do you know how many kilograms of fruit have been sold? 22. The ratio of boys to girls in a primary school was 5: 7, and then it was transferred to 15 girls. At this time, the ratio of boys to girls is 2: 3. How many boys are there in the school? 23. There are two warehouses, one with 30 tons of grain. If you take out110 from warehouse A and put it into warehouse B, the grain quantity of the two warehouses is the same. How many kilograms of grain are stored in the two warehouses? 24. In the sixth grade, 65,438+038 students subscribed to Youth Daily or Pupils' Composition, among which 5/6 students subscribed to Youth Daily and 2/3 students subscribed to Pupils' Composition. How many students subscribe to both newspapers and periodicals?