The largest square that can be cut is a square with a side length of 95 meters, so the area of the remaining part is: (125-95)×95=285 square meters.
On one side of the school corridor, there is a wall 55 meters long and 4 meters wide. On the wall, there is a rectangular glass window, 4 meters long and 3 meters wide. It is necessary to paint this wall now. What is the area to be drawn?
The area to be painted is the area of the whole wall minus the area of the glass.
That is: 55×4-3×4=208 square meters.
Grandpa Wang enclosed an 8-meter-long rectangular henhouse with a fence of 18 meters. Would you please calculate the area of this henhouse?
This problem is considered in two aspects.
On the one hand, the side against the wall is 8 meters long.
Then the length of the side perpendicular to the wall is: (18-8)/2 = 5m.
At this time, the henhouse area is 5× 8 = 40m2.
On the other hand, the side perpendicular to the wall is 8 meters.
Then the length of the wall edge is: 18-8× 2 = 2m.
At this time, the henhouse area is 8×2= 16 square meters.
This is another one.
Mathematical application problems in the second volume of the third grade
Class name student number:
1. Three classmates and I moved 360 books. How many books did everyone move?
During the summer vacation, Xiaoli insisted on writing 36 big characters every day. How many big characters can she write in August?
3. 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?
Xiaoming bought three thermos bottles 150 yuan, and the shop assistant went to 6 yuan. How much is each thermos?
5. 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?
6. A chemical fertilizer plant produces chemical fertilizer 150kg every day. How many kilograms does * * * produce from July to September?
7. The umbrella factory has produced 12 days to produce 5,000 umbrellas, leaving 2 120 umbrellas unfinished. How many umbrellas are produced on average every day?
8. The grocery store sent five boxes of salad oil * * * weight 150kg, each containing six barrels of oil. What is the average weight of oil per barrel?
9. A train with a speed of 75 kilometers per hour departs from A at 9 o'clock and arrives at B at 19 o'clock. How many kilometers is it between A and B?
10, the cotton mill weaves 250 kilometers in five days. According to this calculation, how many kilometers can 16 weave in a day?
1 1, 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?
12, the school is going to use some money to buy prizes, 90 pens, each 5 yuan, and the remaining 100 yuan to buy notebooks. If you only buy each pencil box in 8 yuan with this money, how many can you buy at most?
13, 25 kg of rice per bag and 25 kg of flour per bag, 40 bags of rice and 20 bags of flour were delivered from the grain store. Please ask practical questions about two or more steps of calculation and answer them according to relevant information.
Question:?
14, Xiaoming ordered some milk. If you order quarterly, it will be 100 yuan per quarter. If it is 35 yuan a month, if it is 2 yuan a day, and if he needs to order milk all year round, which do you think is cheaper?
Number of cases 1 10 20 25 30
Number of bottles 24
15, fill in the form
The third volume of mathematics application problems (2)
Class name student number:
16, a large sportswear 30 yuan, a small sportswear 20.
(1) How much does it cost to buy 25 sets of large sportswear? Column calculation:
(2) How much does it cost to buy 45 sets of small sportswear? Column calculation:
(3) How much does it cost to buy 15 sets of large sportswear and 12 sets of small sportswear?
17, the cinema has 25 rows of seats, each row can seat 24 people. We will organize 600 students to watch movies. Can we sit down? what do you think?
18, the cinema has 25 rows of seats, each row can seat 4 1 person. We will organize 1000 students to watch movies. Can we sit down? what do you think?
19, a broken faucet loses 68 grams of water every minute in vain. How many grams of water was wasted when 1?
20. Apple juice 18 boxes, orange juice 12 boxes. There are 25 bottles in each box. How many bottles of drinks are there in a * *?
2 1. There are 25 new buildings in Xili Community, each with 6 floors and 8 households on each floor. How many families can live in this new building? (Answer in two ways)
22, 4 bottles of drinks, 20 yuan, one bottle for each person, how much is it for 48 people?
23. A tour group consists of 48 people and 36 children. Children's tickets 15 yuan and adults' tickets/30 yuan.
(1) How much does it cost to buy a child ticket? Column calculation:
(2) How much does it cost to buy an adult ticket? Column calculation:
(3) How much is a * * *? Column calculation:
24. At the Red Scarf Holiday Activity Station, there are 98 people in the table tennis group, three times more than the basketball group. How many people are there in these two groups?
25. Xiaoping is 12 years old this year, and his grandfather is five years older than him. Grandma is five times his age and two years younger than him. How old is grandpa this year? How old is grandma this year?
26. Miss Wang will type a 20-page manuscript with 25 lines and 28 words in each line. How many words are there in this manuscript? (Answer in two ways)
27. Tian Feng Manor picked 820 kilograms of bananas, and 420 kilograms have been taken away. The rest are packed in a box every 32kg. How many boxes can you hold?
28. The waste battery recycling team collected 730 old batteries in three days, with an average of 240 batteries per day in the first two days. How many batteries were collected on the third day?
29. A mirror is 12 decimeter long and 5 decimeters wide. How many square decimetres is its area? The price of this kind of mirror is 2 yuan per square decimeter. How much does it cost to buy this mirror?
There is a square lotus pond in the garden. Its circumference is 64 meters. How many square meters is its area?