1, 25 people in the road maintenance team maintain the railway every day1250m. According to this calculation, how many people need to maintain the railway 1500m every day?
2. Two movies. The first minister is 585 meters, showing 19.5 points. The second minister is 720 meters, how many minutes more than the first minister?
3. A PLA unit conducts camping training. It was originally planned to March 35 kilometers every day and complete the journey in 15 days. Actually walk 2.5 kilometers more than planned every day. How many days are actually less than planned?
A bridge is 2400 meters long. When the train crosses the bridge, it travels 900 kilometers per minute, and it takes 3 minutes to leave the bridge from the front to the rear. How long is this train?
5. Multiply two numbers. If the multiplicand increases by 12, the product will increase by 60. If the multiplicand increases 12, the product increases 144. What is an original product?
6. Teacher Zhang sends fruit to the children in two classes in Grade One. Everyone in the big class gets 5 pears and 2 apples, and everyone in the small class gets 3 pears and 2 apples. Teacher Zhang gave out 135 pears and 70 apples, so how many children are there in the small class?
7. If the side length of a square is increased by 2.5 cm, a new square is obtained, and the area of the new square is increased by 40.75 cm. Find the area of the original square.
8. The box contains the same number of table tennis and badminton. Take out five ping-pong balls and three badminton balls at a time. After several times, the table tennis disappeared, leaving six badminton. How many ping-pong balls are there?
9. Fill in the decimal part of decimal 0.73823 1693450 with two points representing the cycle segment to make it a cycle decimal. It is known that the number at100th after the decimal point is 3. What is this round decimal point?
10. At a certain moment, the hour hand and the minute hand on the clock face form an angle of 60 degrees. After 6 minutes, how many degrees may the hour hand and the minute hand be?
1 1. For a triangle, if the base is increased by 2 cm, the height remains unchanged, and the area of the new triangle increases by/10 cm2；; If the height is increased by 4 cm and the bottom remains the same, the area of the new triangle will also increase by 10 cm 2. How many square centimeters is the area of the original triangle?
12. Xiaojun's sister accidentally tore off a piece of paper from Xiaojun's math exercise book. The product of two page numbers in this paper is 240. Do you know what these two page numbers are?
13. A company invested 1 0.2 million yuan to do the project, and earned110,000 yuan; Invested 900,000 yuan in Project B, and earned 90,000 yuan. Which project does the company invest in for better returns?
14. The aquarium has three cubical glass tanks with inner walls of 5m, 3m and 2m respectively. The staff sank two corals into small and medium-sized glass jars, and the water surface rose by 6 cm and 4 cm respectively. If two corals sink in a big glass jar, how much will the water level in the big glass jar rise?
15. The Young Eagle Red Flag Brigade of the school organized members to go to Yueliao site in Shanglinhu to engage in social practice activities. The theme this time is: collecting small porcelain pieces. The first four squadrons collected an average of 43 pieces, and after adding the porcelain pieces of the fifth squadron, the average number increased by 2 pieces. How many movies did the Fifth Squadron collect?
16. At the Sunshine Science and Technology Festival, the teacher performed an interesting magic trick: there were two coins in the magic bag. The teacher took out 1 coin for the first time, turned them into two coins and put them back in the magic bag ... The fifth time, he took out five coins from the magic bag, turned each coin into two, and did not put them back in the magic bag. How many coins are there in the magic bag at the moment?
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * I am a gorgeous dividing line ~ * * * * * * * * * * * * * * *.
Here are the answers:
1, 1250÷25= 50 (meters) per person per day.
Repair 1500m needs to be increased (1500- 1250)÷50=5 (person).
2. Display per minute: 585÷ 19.5=30 (m)
The second film was shown much more than the first film: (720-585)÷30=4.5 (minutes).
3. Actual use: 35 * 15(35+2.5)= 14 (days)
Less use 15- 14= 1 (days)
4. Bridge length+vehicle length: 900*3=2700 meters
Captain: 2700-2400 = 300m.
5.a. If the multiplicand is increased by 12, the multiplier remains unchanged, the product is increased by 60, and the multiplier is 60/ 12=5.
B. If the multiplicand is constant and the multiplier increases 12, the product increases 144, and the multiplicand is 144/ 12= 12.
The original product was 12*5=60.
6. A. There are 70 apples, 2 for each person, and 70/2 for large classes = 35 people.
B. 135 pears, 5 in each major category, 3 in each minor category, 3 in each category, and the rest.
135-35*3=30, the big class gets 2 pears each, so the big class has 30/2= 15 children.
Then there are 20 children in the small class.
7. Suppose that the side length of the original square is one centimeter.
(a +2.5)？ - a？ = 40.75
Answer? + 5a + 2.5？ - a？ =40.75
a=6.9
6.9 ? =47.6 1 cm2
The area of the original square is 47.6 1 cm2.
8. Suppose you take X times, the table tennis is gone, and there are six badminton left.
5x = 3x + 6
2x = 6
x =3
5×3= 15
Table tennis has 15.
14.5m = 500cm 3m=300cm 2m = 200cm
(300×300×6+200×200×4)÷(500×500)= 2.8m
The water in large FRP will rise by 2.8 meters.
13 . 10 ÷ 120≈0.083 9÷90=0. 1
The income of project b is better.
15.(43+2)×5-43×4 = 53 tablets.
1 1. Area of triangle: 1/2 base × height.
According to the meaning of the question, suppose that the base of the triangle is a cm and the height is h cm.
1/2(a+2)×h = 1/2ah+ 10
1/2a(h+4)= 1/2ah+ 10
h= 10 a=5
The area of the original triangle is1/2ah =1/2× 5×10 = 25 cm2.
12. Suppose two page numbers are X and x+ 1 respectively.
x × (x+ 1) =240
x= 15
Then x+1=15+1=16.
10. The hour hand turns 30 in one hour and 30 ÷ 60 in one minute = 0.5.
Minutes and seconds 360 ÷ 60 = 6.
After 6 minutes, the hour hand turned 6× 0.5 = 3.
The minute hand turned 6× 6 = 36.
The angle between the hour hand and the minute hand is (30-3)+36 = 63.
16.* * There are 17 coins.
There are a and b coins in the magic belt. Take out B for the first time and change it to bc. There are three coins now.
The second time I took out bc, it became bcde, and now there are 5 coins.
The third time I took out bcd, it became bcdfgh, and now there are 8 coins.
The fourth time dfgh was taken out, it became igkldfgh, and now there are 12 coins.
The fifth time I took out igkld, it became mnopq igkld, and now I have 17 coins.
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I don't quite understand this, but the monthly exam paper is really difficult to get. There is a sentence in the pen that the teacher's mind is more difficult to fathom than the sacred heart. That topic is the same every time. . However, you can go to the computer to find scattered topics to do and review your usual papers. There are not many things in primary school, and I believe it won't take long to remember them well. Well, that's all. Having said so much, I hope I can condense it. ! ! ! ! !