Science and technology books = 3600 ÷ (1+0.25) = 2880;
An 800-meter-long expressway has been repaired by 3/5. How many meters are left?
Residual = 800× (1-3/5) = 320m;
The municipal government plans to invest 35 million yuan to build a trade center, which is actually less than planned. How much did you save?
The municipal government plans to invest 35 million yuan to build a trade center, which is actually less than planned. What is the actual investment?
There are 65,438+000 potted flowers in the greenhouse. Lao Wang took them away the first day and the second day. How many pots of flowers are left?
There are 450 pear trees in the orchard. Apricot trees are pear trees, and apricot trees are also equivalent to peach trees. How many peach trees are there in the orchard?
7. The school has 120 football and basketball. The ratio of football to basketball is 5: 3. How many football and basketball are there?
Football =120× 5 ÷ (5+3) = 75;
Basketball =120-75 = 45;
The area of Tiananmen Square is 440,000 square meters, which is smaller than the Forbidden City. What is the area of the Forbidden City? (Equation solving)
9, packaging a batch of candy, a ***3600 kg. It's already packed, and the rest is ready to be distributed to workshops 1 and 2 at 4: 5. How many kilograms should each workshop contain?
10, Uncle Li of the oil mill told Xiao Jing: "2000 kilograms of peanuts can squeeze out 760 kilograms of peanut oil." What is the oil yield of these peanuts?
Oil yield = 760 ÷ 2000×100% = 38%;
1 1. Yuxin Primary School Library has 4000 books and Xinfeng Primary School Library has 5000 books. What percentage of books in Yuxin Primary School are less than those in Xinfeng Primary School?
Less = (5000-4000) ÷ 5000×100% = 20%;
12, a circular manhole cover with a circumference of 62.8 decimeters. What is the area of this manhole cover?
Radius =62.8÷3. 14÷2= 10 decimeter;
Area = 3.14×10×10 = 314 square decimeter;
13, Xiaolan bought an ordinary house with a total price of 80,000 yuan. There will be a 96% discount if the house payment is paid in one lump sum. (6 points)
(1) What is the total price of the house after the discount?
Total price = 80,000× 0.96 = 76,800 yuan;
(2) When buying a house, how much deed tax should I pay for 65438+ 0.5% of the actual house price?
Tax = 76800× 0.015 =1152 yuan;
14. Draw a square with a length of 6.28 cm. If you draw a circle with this length of wire, what is the area of the circle?
The radius of the circle = 6.28× 4 ÷ 3.14 ÷ 2 = 4 cm;
Area = 3.14× 4× 4 = 50.12cm2;
15. Teacher Chen kept her salary of 5,000 yuan in the bank for two years, with an interest rate of 4.68%. How much interest can he get after maturity? (Interest tax rate is 5%)
Interest =5000×2×0.0468=468 yuan;
There are no figures for the rest, so it is better to ask separately and adopt more, haha.
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