The final exam is approaching, and students doing more math problems will help us improve our math scores and expand our thinking. Below, I have carefully collected the final examination papers and answers about the first volume of the fourth grade of People's Education Press for your reference. I hope I can help you!
The first part of the basic knowledge (***30 points)
Fill in the blanks. (2 points for each question, ***20 points)
1. It is reported that the severe impact of Typhoon Morakot No.8 caused direct economic losses of 993.7 million yuan to Wenzhou, which was rewritten as () million yuan, and the mantissa after omitting 1 100 million yuan was about () million yuan.
2. A ten-digit, the highest digit is 7, the millions and hundredths are all 5, and the other digits are all 0. This number is written as (), and the highest digit of this number is ().
3. 1 fillet = () right angle = () right angle.
4. What can I fill in the () on the right? ()×24 & lt； 100 53×()& lt； 302
At 5 o'clock and 4 o'clock, the angle between the hour hand and the minute is (); At 6 o'clock sharp, the angle between the hour hand and the minute hand is ().
6. Let the quotient of 4□6÷46 be two digits, with the smallest () in □ and the largest () in □.
7. put ">" in the last line. , "<, or" = ".
3654879〇3654897 ? 26900 1000000270,000
480÷ 12〇480÷30 ? 18×500〇50× 180
8. The product of two numbers is 240. If one factor remains the same and the other factor decreases by 10 times, the product is ().
9. In A ÷ 15 = 14...b, the remainder b is the most desirable (), and the dividend a is the most desirable ().
10. A dictionary needs 39 yuan, and Mr. Wang Can can buy () such a dictionary at most for 376 yuan.
2. Judgment: Put "√" in brackets for the right and "×" for the wrong. (65438+ 0 points for each question, ***5 points)
1, the size of the angle has nothing to do with the length of the side, but with the size of both sides. ………………………( )
2. In the integer bit sequence table, the advancing rate between any two counting units is 10. ……………( )
3. The obtuse angle must be greater than the right angle, and the angle greater than the right angle must be obtuse. …………………………( )
4. Rectangle is a special parallelogram. ………………………………………………( )
5. When two numbers are divided, the divisor is multiplied by 10, and the divisor is divided by 10, and the quotient remains unchanged. ………………( )
3. Choice: Fill the serial number of the correct answer in brackets. (65438+ 0 points for each question, ***5 points)
1, among the following numbers, the number that does not read zero is ().
a、 10 10 10 10 10？ b、 1 100 1 100？ c、 1 1 1000 10
2. The mantissa after omitting 59296500 and "ten thousand" is about ().
5930？ B, 59.29 million? C, 59.3 million
3. It is estimated that the quotient in the following formula is closest to 9 ().
a、434÷5 1？ b、632÷7 1？ 520÷60
The remainder of 4.230÷50 is ().
a、3？ b、30？ 300 pounds
5. Two identical triangles can be spelled as ().
A, parallelogram? B, rectangle? C, trapezoid
Part II Basic Skills (***38 points)
Fourth, write numbers directly. (Each question 1, *** 12)
60×8= ? 24×30= ? 96÷6= ? 70× 12=
0÷32= ? 540÷6= ? 18×50= ? 420÷70=
39×4 1≈ ? 695×7 1≈ ? 6294÷7 1≈ 479÷8 1≈
5. Calculate the following questions vertically. (3 points for each question, *** 18 points)
128×25= ? 8 16÷5 1= ? 130×70=
2880÷64= ? 30 1×36= ? 230÷ 15=
6. Draw a picture and fill it in. (***8 points)
1. Draw an angle of 105 with a protractor.
2. It is known in the right figure that ∠ 1 = 43, ∠2= () and ∠3= ().
3. Draw the height at the bottom of the parallelogram.
The third part to solve the problem (***32 points)
Seven, solve the following problems. (5 points for each question)
Stand No.5 of Huanglong Gymnasium 1, row 52, each row has 35 seats. How many people can sit in this stand?
2, a school to carry out power-saving activities, the first four months * * * power-saving 424 degrees. According to this calculation, how many kWh can be saved in one year (65438+February)?
3. Fruit shop Li took 2000 yuan to buy apples in the wholesale market, bought 25 boxes, and left 150 yuan. What is the wholesale price of apples per box?
4. Teacher Chen went to the sporting goods store and bought 12 basketball. The price of each basketball is 63 yuan, and she also spent 240 yuan to buy eight volleyballs. How much did Mr. Chen spend?
5. The school should order 24 TV sets and 45 computers, each TV set needs 2 100 yuan, and each computer needs 3,400 yuan. The school has prepared 200,000 yuan. Is that enough?
Eight, observe the statistical chart, and then complete the question. (***7 points)
1. It can be seen from the figure that group () has the largest number of boys and group () has the smallest number of girls. Group () has the largest number of people, and group () has the least number of people.
2. Through calculation, the total number of the three interest groups is (), and the number of boys is more than that of girls (). There are () more people in the math team, just as many as the number of people in the science and technology team.
The fourth part of mathematical thinking (additional 10)
1, a pot can bake at most 2 cakes at the same time, each side needs to bake for 3 minutes, and baking 5 cakes needs at least () minutes; It takes at least () minutes to bake 10 cakes.
2. When Xiaodong does multiplication, one of the factors 42 is taken as 24, and the product obtained as a result is 360 less than the correct product. The correct product should be ().
Reference answer:
The first part of the basic knowledge (***30 points)
Fill in the blanks. (2 points for each question, ***20 points)
1. It is reported that the severe impact of Typhoon Morakot No.8 caused direct economic losses of 993.7 million yuan to Wenzhou, which was rewritten as "ten thousand yuan", and the mantissa after omitting 1 100 million yuan was about (10) ten thousand yuan.
2. A ten digit, the highest digit is 7, all millions and hundreds are 5, and all other digits are 0. This number is written as (7005000500), and the highest digit of this number is (one billion).
Write on the draft paper first: 7 5 5.
7 500 0500 (* * has 8 digits, 2 digits are missing, and 0 is used to supplement between 7 and 5).
70 0500 0500 (finally, check according to the meaning of the question)
3. 1 fillet = (2) right angle = (4) right angle.
4. What can I fill in the () on the right? (4)×24 & lt； 100 53×(5)& lt； 302
5. At 4 o'clock sharp, the angle between the hour hand and the minute is (120); At 6 o'clock sharp, the angle between the hour hand and the minute is (180).
At 4 o'clock sharp, the angle between the hour hand and the minute hand is 30×4.
6. Let the quotient of 4□6÷46 be two digits, with the smallest (6) in □ and the largest (5) in □.
7. put ">" in the last line. , "<, or" = ".
3654879 & lt365489726900 100000 = " " & gt； 270 thousand
480 \ 12 & gt； 480÷30 ? 18×500=50× 180
8. The product of two numbers is 240. If one factor remains the same and the other factor decreases by 10 times, the product is (24).
9. When A ÷ 15 = 14...B, the remainder b is the best (14), and the dividend a is (224).
The remainder must be less than the divisor, and the largest remainder is a number less than the divisor by 1.
15× 14+ 14=224
10. A dictionary needs 39 yuan, and Mr. Wang Can can buy 9 such dictionaries at most for 376 yuan.
376÷9=9.6
2. Judgment: Put "√" in brackets for the right and "×" for the wrong. (65438+ 0 points for each question, ***5 points)
1, the size of the angle has nothing to do with the length of the side, but with the size of both sides. ……………………( √)
2. In the integer bit sequence table, the advancing rate between any two counting units is 10. ……………( ×)
In the integer bit sequence table, the advancing rate between every two adjacent counting units is 10.
3. The obtuse angle must be greater than the right angle, and the angle greater than the right angle must be obtuse. …………………………( ×)
Right angles and rounded corners are larger than right angles.
4. Rectangle is a special parallelogram. ………………………………………………( √)
5. When two numbers are divided, the divisor is multiplied by 10, and the divisor is divided by 10, and the quotient remains unchanged. ………………( ×)
The chamber of commerce has expanded 100 times.
3. Choice: Fill the serial number of the correct answer in brackets. (65438+ 0 points for each question, ***5 points)
1, among the following numbers, the number that does not read zero is (b).
a、 10 10 10 10 10？ b、 1 100 1 100？ c、 1 1 1000 10
1010101010, pronounced: one hundred and eleven thousand one hundred and ten.
11001100, pronunciation: 1110.
11100010, pronunciation:110/0.
2. Omit 59296500 and the mantissa after "ten thousand" is about (c).
5930？ B, 59.29 million? C, 59.3 million
Thousand digits is 6, rounded to ten thousand digits, and ten thousand digits is 9+ 1.
3. It is estimated that the quotient in the following formula is closest to 9 (b).
a、434÷5 1？ b、632÷7 1？ 520÷60
The remainder of 4.230-50 is (b).
a、3？ b、30？ 300 pounds
5. Two identical triangles can definitely spell one (A).
A, parallelogram? B, rectangle? C, trapezoid
Such two triangles can only be combined into a parallelogram.
Part II Basic Skills (***38 points)
Fourth, write numbers directly. (Each question 1, *** 12)
60×8=480 ? 24×30=720 ? 96÷6= 16 ? 70× 12=840
0÷32 =0 ? 540÷6= 90 ? 18×50=9000 ? 420÷70=6
420÷70=42÷7=6 ? 39×4 1≈ 1600 ? 695×7 1≈49000 ? 700×70≈49000
6294÷7 1≈ 90 ? 6300÷70=630÷7=90 ? 479÷8 1≈6 480÷80=6
5. Calculate the following questions vertically. (3 points for each question, *** 18 points)
128×25=3200 ? 8 16÷5 1= 16 ? 130×70=9 100
2880÷64=45 ? 30 1×36= 10836 ? 230÷ 15= 15……5
6. Draw a picture and fill it in. (***8 points)
1, omit 2.4
3. It is known in the right figure that ∠ 1 = 43, ∠ 2 = (47) and ∠ 3 = (133).
The third part to solve the problem (***32 points)
Seven, solve the following problems. (5 points for each question)
Stand No.5 of Huanglong Gymnasium 1, row 52, each row has 35 seats. How many people can sit in this stand?
Solution: 52×35= 1820 (person)
Answer: It can take 1820 people.
2, a school to carry out power-saving activities, the first four months * * * power-saving 424 degrees. According to this calculation, how many kWh can be saved in one year (65438+February)?
Solution: 12÷4×424
=3×424
= 1272 (degree)
A: It can save electricity 1272 kWh a year.
3. Fruit shop Li took 2000 yuan to buy apples in the wholesale market, bought 25 boxes, and left 150 yuan. What is the wholesale price of apples per box?
Answer: (2000- 150)÷25
= 1850÷25
=74 (yuan)
A: The wholesale price of apples per box is 74 yuan.
4. Teacher Chen went to the sporting goods store and bought 12 basketball. The price of each basketball is 63 yuan, and she also spent 240 yuan to buy eight volleyballs. How much did Mr. Chen spend?
Solution: 63× 12+240
=756+240
=996 yuan
A: Teacher Chen spent 996 yuan.
5. The school should order 24 TV sets and 45 computers, each TV set needs 2 100 yuan, and each computer needs 3,400 yuan. The school has prepared 200,000 yuan. Is that enough?
Solution: 2 100×24+3400×45
=50400+ 15300
= 203,400 yuan (RMB) < 200,000 yuan, and the money is not enough.
Not enough money.
Eight, observe the statistical chart, and then complete the question. (***7 points)
Statistics on the number of boys and girls in extracurricular interest groups in Xinxing Primary School in September 2009
1. As can be seen from the figure, the group with the largest number of boys is (science and engineering), and the group with the least number of girls is (mathematics). The group with the largest number of boys is (science and engineering), and the group with the smallest number of girls is (mathematics).
2. Through calculation, the total number of the three interest groups is (139), and the number of boys is more than that of girls (15). Add (22) more people to the math team, which will be as many as the number of people in the science and technology team.
The fourth part of mathematical thinking (additional 10)
1, a pot can bake at most 2 cakes at the same time, the front and back sides need to bake for 3 minutes, and it takes at least (18) minutes to bake 5 cakes; It takes at least (30) minutes to bake 10 cakes.
Solution: It takes 6 minutes to bake 2 cakes in one pot.
It takes three pots to bake five cakes. (Note that this is not 2.5 pots) It takes 6×3= 18 minutes.
It takes 5 pots to bake 10 cakes. It takes 6×5=30 minutes.
2. When Xiaodong does multiplication, one of the factors 42 is taken as 24, and the product obtained as a result is 360 less than the correct product. The correct product should be (840).
Solution: let's assume that the factor is a.
Then 42A-24A=360
18A=360
A=20
Correct product: 42A=42×20=840.
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