A science and technology book has 256 pages. Xiaohong studied for 8 days and read 20 pages every day. How many pages are left?
4. Jian Peijun copied words. He copied 30 words in the morning and 6 lines in the afternoon, each with 4 words. How many words did he copy a day?
The school bought 80 pots of flowers, put 20 pots at the door, and distributed the rest to 6 classes. How many cans are allocated to each class on average?
6. The circumference of a square is 800 meters, and 7 tons of rice are collected per hectare. How many tons can this land collect?
7. Pack 480 bottles of ink, one bottle for every 6 bottles and one bottle for every 8 boxes. How many cases are packed in a * * *?
8. Students in Grade Three and Grade Four should go by boat. A boat can only carry six people. There are 30 students in grade three and 22 students in grade four. How many ships should there be?
9. The car travels 270 kilometers in 3 hours. According to this calculation, how many kilometers do you drive in 5 hours?
10, children buy tickets for 12 for each 8 yuan. How much should I refund?
extreme
1. Eggs collected in Asian chicken farm on Monday spring, 18kg packed in a box. After 8 cases are packed, there is 16kg left. How many kilograms of eggs were collected on Monday? 2. 3 boxes of towels, each box 12 pack, 20 pieces per pack. * * * How many towels are there?
The waterway between Port A and Port B is 360 kilometers long. Xiaoming boarded the ship from A at 7: 00 a.m. and arrived at B at 4: 00 p.m. ... How many kilometers does this passenger ship travel on average per hour?
A rectangular orchard is 400 meters long and 60 meters wide. What is the area of this orchard? How many hectares?
The fresh fruit shop sold 14 boxes of peaches in the morning and 20 boxes of peaches in the afternoon. If each box of peaches weighs 26 kilograms. How many boxes of peaches were sold today?
There are 23 boys and 25 girls in Class One, Grade Four. Go to work in groups of four. How many groups should a * * * be divided into?
7. Read a story book with 150 pages in winter and winter. I read 40 pages on the first day, and I read as much on the second day as on the first day. How many pages are left to read?
8. Cars travel 450 kilometers in five hours and trucks travel 400 kilometers in four hours. Which car runs faster?
9. The playground of Hongxing Primary School is 300m long and100m wide. Xiaohong ran four times around the playground. How many meters did he run? How many hectares are there in the playground?
10, 5 ping-pong balls are packed in a bag, and every 4 bags are packed in a box. How many boxes can 200 table tennis balls hold?
Tisso
1. A car traveled from A to B at a speed of 60 km/h, driving for 3 hours, and driving for 2 hours when returning, just arriving at B. What was the speed when returning? 2. The length is unchanged and the width is increased to 24 meters. What is the expanded green area?
The bus travels 45 kilometers per hour. Xiaoming takes a bus from 8: 00 in the morning to his grandmother's home, which is 100 kilometers away from home. Can he get to her home at 10 in the morning?
4. Basketball 12 yuan/piece, football 1 1 yuan/piece. The teacher brought 50 yuan and needed to buy three balls. How many ways can I buy it?
A swimming pool is 50 meters long and 25 meters wide. How many such swimming pools are around 1 hectare?
6. If 16 people can stand at 1 square meter, how many people can stand at 1 hectare? 1 square kilometer How many people can stand?
7. A city forest park has 124 hectares of forest. 1 hectare forest can retain 32 tons of dust a year and suck 85 tons of water from the ground one day. How many tons of dust can be collected in a year? How many tons of water can be sucked out in a day?
An elephant in the park eats 350 kilograms of food a day. The breeder prepared 5 tons of food. Is this elephant enough?
9. The grain store delivered 20 bags of rice and 20 bags of flour, each bag containing 90 kilograms of rice and 25 kilograms of flour. How many kilograms more rice is brought in than flour?
10. There are 60 boxes of apples in the fruit shop, three times more than oranges. 10 box. How many boxes of oranges are there in the fruit shop?