(1) The school planted 250 trees, of which 10 died and the survival rate was ()%.

(2) A barrel of oil weighs one kilogram and is used up in four days. Use () barrels of oil and () kilograms of oil every day on average.

(3) Xiao Ming reads books. After reading it, there are 96 pages left. How many pages are there in this book? With () as the unit "1", 96 pages are equivalent to () () of this book, and the formula for solving problems is ().

(4) There are 32 boys and 24 girls in class 6/kloc-0, with more boys than girls () () and fewer girls than boys () (), and girls account for () () of the whole class.

2. True or false:

(1) A wire is 90% meters long. ()

(2) 1 ton of flour has eaten 85%, leaving 0. 15 ton. ()

(3) A number is greater than B number, and B number is less than A number. ()

(4) The difference between the two piles of sand is 20 tons. After using 20% of each pile, the difference between the two piles of sand is still 20 tons. ()

3. There are 1 100 students in Jilin Street Primary School, including 198 sixth graders. What percentage of the students in the sixth grade account for the whole school?

Last year, there were 65438+0,000 students in Jilin Street Primary School. This year, there are 1 65438+0,000 students, an increase of one percentage point over last year?

5. A book has 100 pages. After reading 60 pages, how many parts of this book have you read?

6. Show me the train tickets for this distance. Children's fare is 25% of adult's fare.

(1) If the adult fare is 12.4 yuan, what is the child fare? (2) If the child fare is 12.4 yuan, what is the adult fare?

7.( 1) A worker has to process 120 parts, and 80% of them have been processed. How much to deal with? (2) A batch of parts in a factory has been processed by 80%, and there are 24 left. How many parts are there in this batch?

There are 20 poplars in the campus, and the number of fir trees is 60% of that of poplars. How many fir trees are there? There are 20 poplars on campus, and the number of Chinese fir is 60% of that of poplars. How many Chinese fir trees are fewer than poplar trees?

9. A road needs to be completed in three days. The first day is 20% of the total length, the second day is 200m, and the third day is the sum of the previous two days. What is the total length of this road?

10, the garment factory plans to produce 2000 sets of garments, and there are still unfinished plans. How many sets can be produced, and the output can exceed 25%?

1 1. math interest group * * *, with 42 people, including girls. Later, several girls were added. At this time, how many girls have been added to the total number of girls?

12, (1) A worker has to process 120 parts, and 80% of them have been processed. How much more to deal with? (2) A batch of parts in a factory has been processed by 80%, and there are 24 left. How many parts have been processed in this batch?

13, road repair, 20% of the total length on the first day, 200m on the second day, and the sum of the first two days on the third day. What is the total length of this road?

3. (1) The ratio of A to B is 2: 3, and the ratio of B to C is 3: 4. What is the ratio of a number to c number? (2) The ratio of number A to number B is 2: 3, and the ratio of number B to number C is 6: 7. What is the ratio of a number, b number and c number?

4. Party A, Party B and Party C share the same amount of goods in one car, and the freight from place A to place B has to be paid to 90 yuan: Party A is preparing the land for unloading, while Party B is preparing the land for unloading, and only Party C arrives at place B, so how to share the freight?

5. Build an expressway with a total length of 12km. It took three days to build1.5km. According to this calculation, how many days will it take to complete the expressway?

6. The school bought 126 meters of plastic rope, and made five skipping ropes every 9 meters. According to this calculation, how many skipping ropes can you make?

7. The distance from Beijing to a certain place is 1200 km, and only 4 cm is drawn on a traffic map. Find out the scale of this traffic map.

8. There is a rectangular experimental field, 250m long and100m wide. Draw it on the farmland planning map with the scale of 1: 5000. How many centimeters should I draw?

9. On the map with scale, the distance between A and B is 20 cm. Two trains leave from A and B relatively simultaneously. Car A travels 54 kilometers per hour and car B travels 46 kilometers per hour. How many hours did the two trains meet?