Class name score score
First, the basic training camp. (65,438+0 points per grid, ***27 points)
1.(4 points) 7 billion, 500,000, the number consisting of two ones is, it is a single digit, and the highest digit is a single digit.
2.(2 points) 70.302 billion, and the mantissa after omitting 1 billion digits is about.
3.(2 points) What can I fill in the following _ _ _ _?
89 567 ≈ 900,000 80,789 ≈ 800,000.
4.(4 points) The newly opened Kunming-Shanghai high-speed railway, with a speed of about 305 kilometers per hour, is a known high-speed railway. This high-speed train takes 8 hours from Kunming to Shanghai, and the whole journey from Kunming to Shanghai is kilometers.
5.(4 points) 63 1020500 is a number. Its highest digit is 1 digit. 3 is a number and100000 is a number.
6.(2 points) Find the rule to fill in the blanks: 15× 14 = 2 10, then 15× 56 =, 15× 7 =.
7.( 1 min) The product of two factors is 50, one factor is multiplied by 2, and the other factor is unchanged, so the product is.
8.(2 points) 5 hectares = square meters; Square kilometers = 800 hectares.
9.(2 points) Fill in the appropriate unit name in the horizontal line.
Shilin county covers an area of 17 19, and Xiaoming bedroom covers an area of 12.
10.(4 points) Fill in ">" and "
① 45368 45683 ② 260,000 260,000
③ 370×16 307×16 4401hectare 400 square kilometers.
I am a little judge. Mark "√" for the right and "×" for the wrong. (6 points, 65438+ 0 point for each question)
1 1.( 1 min) The number of 6,600 is 600,600. ()
12.( 1) A librarian is 25m wide and 20m wide. The library covers 5 hectares. ()
13.( 1 point) The propulsion rate between two counting units is ten. (? )
14.( 1) The "AC" key on the calculator is the clear key. )
15.( 1 min) The Bird's Nest covers an area of about 20 hectares, and the five Bird's Nest covers an area of about 1 km2. )
16.( 1) bits, tens, hundreds, thousands ... are all counting units. )
Third, choose carefully, choose the letter before the correct answer and fill in the brackets. (5 points, 65438+ 0 point for each question)
17.( 1) China's land area is about ().
A.960m2.96 million hectares
C. 9.6 million square kilometers
18.( 1 point) There are () zeros at the end of the 250×80 product.
A. two? Three? C. IV
19.( 1) The number ten thousand more than 79999 is ().
80000 b 89999 c 179999
20.( 1 min) When calculating 405×27, "4" in 405 and "7" in 27 are multiplied to represent ().
A.400×7 B.400×70？ About 40×70
2 1.( 1 min) Among the following figures, the one that does not read zero is ().
A.30000900？ B.30009000？ C.30900000
Fourth, calculate carefully, I am the best. (32 points)
22.( 12 points) oral calculation.
25×4= ? 160×30= 24×5= 143×98≈ 320÷8= 0÷400=
125×8= 197×42≈ 8×40= 30×20= 1×550=? 42× 10 1≈
23.( 14) column vertical calculation. (Check with ※)
385×54= ? 580×60= ※604×70=
39×432= ? 209×45= ※840×38=
24.(6 points) Column calculation.
What is the sum of (1)308 45s?
(2) What is 841less than 12 times 150?
Verb (abbreviation for verb) applies what you have learned and solves problems. (30 points)
25.(3 points) It took Uncle Li 16 hours to go to Beijing by train from a certain city, and the train speed was 147 kilometers per hour. How many kilometers is it from this city to Beijing? ?
26.(4 points) An elephant in the park eats 350 kilograms of food a day. Is the 6 tons of food prepared by the breeder's uncle enough for the elephant to eat for 20 days?
27.(5 points) Uncle Wang delivers goods from place A to place B by car. When he went, the speed was 50 kilometers per hour, and it took him three hours to arrive. It only took him two hours when he came back. What was his speed when he came back?
28.(5 points) In the "reading" activity, the school will buy 8 sets of children's encyclopedias and 8 sets of fairy tales. Every set of children's encyclopedias 125 yuan, and every set of fairy tales/75 yuan. How much does it cost to buy these books
29.(5 points) The width of this rectangular piece of land as shown in the figure should be increased to16m, and the length will remain unchanged. How many square meters is the expanded area?
29.(5 points) The school plans to buy 24 computers at a price of 4,500 yuan each. When buying these computers, Mr. Li from the school general affairs office took 1 10000 yuan. Is that enough?
3 1.(3 points) In recent years, Kunming has increased its investment in the construction of affordable housing. At the beginning of this year, it is planned to start construction of 580 sets of affordable housing, each with 24 sets. How many sets of affordable housing are planned to be built this year?
Word version and answers, including mid-term knowledge point induction, please move:
Mid-term examination of the first volume of fourth grade mathematics (knowledge points+famous school papers+answers)