People's education printing plate fourth grade second volume mathematics midterm examination paper and answer.
I. Fill in the blanks (1, * * * 25 per blank)
1.(4 points) Elementary arithmetic includes _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
2.(2 points) In the formula with brackets, calculate _ _ _ _ _ _ _ first.
3.( 1 min) A number minus two numbers equals this number _ _ _ _ _.
4.(2 points) A+ 18- 18+A is the application of _ _ _ _ _ _ _ _ _.
5.(4 points) 72? 35+72? 65﹦72? (_ _ _ _ _ _+_ _ _ _ _ _ _) is the application _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
6.(2 points) To determine the position of an object, you must know _ _ _ _ _ _ and _ _ _ _.
7. The three digits of (4 points) are _ _ _ _ _ _, and the smallest five digits are _ _ _ _ _ _. Their sum is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
8.(2 points) The school is located at 35 north of Xiaolijia. Direction, 1 km away, Xiaoli's home is in the _ _ _ _ _ _ _ direction of the school, and the distance is _ _ _ _ _.
9.(4 points) The unit of counting one digit after the decimal point is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
2. Judgment: (5 points)
10.( 1 point) 0 is divided by any number to get 0. _ _ _ _ _ _ _.
1 1.( 1) 758+396-758+400-4 _ _ _ _ _ _.
12.( 1 min) 36? ( 100+2)﹦36? 100+2 _________ .
13.( 1 min) 54? (6? 9)﹦54? 6? 9 _________ .
14.( 1 min) 25? 12? 4﹦(25? 4)? 12 _________ .
Three. Selection: (fill in the correct serial number, 5 points)
15.( 1 min) and ○-△ equal formula is ().
A.○﹣(□﹣△○﹣(□+△○﹣□+△
16.( 1) (33+ 102)? (3? 5) If there are no brackets, you should count () first.
A. addition b division c multiplication
17.( 1) and 550? (5? 10) The formula of the equal result is ()
A.550? 5? 10 B. 550？ 10? 5 C. 550？ 5? 10
18.( 1 min) The formula for finding more than 3400 times 700 times is ().
A.3400? 2+700 B. 3400？ 2+700 C. 3400﹣700？ 2
19.( 1 min) The length of a rectangle is 35 meters, which is five times the width, and the circumference is ().
175m
Four. Calculation: (***33 points)
20.(9 points) Write the numbers directly.
7? 7? 7? 7﹦ 52+25﹣52+25﹦ 125? 8﹣250﹦
320+80? 3﹦ 72? 6? 2﹦ 15? 6? 9﹦
100? 25? 4﹦ 0? b﹦ 64？ 64? 7﹦
2 1.( 12 points) parting calculation:
( 1)(3 15? 4﹣364)? 7 (2)2 1? 9﹣962? 74 (3)2600? ( 1 100﹣36? 25) (4) 17? (290﹣288? 2)
22.( 12 points) Calculate by simple method:
45? 98+45? 2 452﹣( 152+240) 99? 27
1 120? 16? 7 1 13? 36﹣ 13? 36 179﹣245+32 1﹣ 155.
Five, column calculation (6 points):
23.(3 points) What is the sum of the quotient of 25 divided by 175 and the products of 17 and 13?
24.(3 points) Divide 4000 by 25 and subtract the product of 13 and 12. What is the difference?
Six, operational problems (6 points):
25.(6 points) The bear is 30 east of the south of the forest park. Walk 200 meters in the direction of the pigsty, and then walk 40 meters northeast from the pigsty? Walk 400 meters to the kitten's house. Please draw a road map from the bear to the kitten's house.
Seven, the application problem (20 points):
26.(5 points) A chemical fertilizer plant produces 365,438+00 tons of chemical fertilizer 1 month, 400 tons of chemical fertilizer in February and 490 tons of chemical fertilizer in March. How many tons of chemical fertilizer are produced on average every month?
27.(5 points) A horse eats 12 kg of grass every day. How many catties of grass can 25 horses eat a week if they are preserved in this way?
28.(5 points) Master and apprentice make machine parts, Master Wang makes 45 pieces per hour, and apprentice makes 35 pieces per hour. They worked together for eight hours. How many pieces did a * * * make?
29.(5 points) The vegetable supermarket shipped 8 10 kg of potatoes and 585 kg of tomatoes, and each 45 kg was packed in a basket. How many baskets full of potatoes are there than those full of tomatoes?
Reference answer:
I. Fill in the blanks (1, * * * 25 per blank)
1.(4 points) Elementary arithmetic includes addition, subtraction, multiplication and division.
Analysis: Addition, subtraction, multiplication and division are called four operations, addition and subtraction are called first-level operations, and multiplication and division are called second-level operations.
Answer: Elementary arithmetic includes four operations: addition, subtraction, multiplication and division.
So the answer is: addition, subtraction, multiplication and division.
Comments: This question examines the definition of arithmetic. The definition of the four arithmetics is that addition and subtraction are called first-level operations and multiplication and division are called second-level operations.
2.(2 points) Formula with brackets, which should be counted first.
Solution: solution: in the formula with brackets, it must be calculated first (in brackets);
So the answer is: in brackets.
Comments: This question examines students' mastery of elementary arithmetic order.
3.( 1 min) One number minus two numbers equals this number minus the sum of these two numbers.
Analysis: According to the nature of subtraction, we can know that subtracting two numbers from one number is equal to subtracting the sum of these two numbers, so as to solve it.
Solution: One number minus two numbers equals this number minus the sum of these two numbers.
So the answer is: subtract the sum of these two numbers.
Comments: This question examines the essence of subtraction, expressed in letters: A-B-C = A-(B+C).
4.(2 points) A+ 18﹦ 18+A is the commutative law to which addition is applied, and the letter indicates A+B = B+A. 。
Analysis: According to the meaning of additive commutative law, two numbers are added to exchange positions, and the sum remains unchanged.
Solution: Solution: A+ 18- 18+A is an commutative law applying addition.
The letters a+b = b+a.
So the answer is: the commutative law of addition, A+B = B+A.
Comments: The key to solve this problem is the significance of additive commutative law.
5.(4 points) 72? 35+72? 65﹦72? (35+65) is the distribution law of applying multiplication, which is expressed by letters as (a+b)? c=a？ c+b？ c。
Analysis: the meaning of the law of multiplication and distribution: the sum of two numbers multiplied by a number is equal to the number multiplied by two numbers respectively, and then the products are added.
Answer: Solution: 72? 35+72? 65﹦72? (35+65) is the distribution law applying multiplication,
Expressed in letters as (a+b)? c=a？ c+b？ c.
So the answer is: 35, 65, a+b)? c=a？ c+b？ c.
Comments: The key to solve this problem is the significance of the law of multiplication and distribution.
6.(2 points) To determine the position of an object, you must know the direction and distance of the object.
Analysis: To determine the position of an object, it is necessary to know where the object is in another object and how far it is from the original object, so as to determine this.
Solution: Solution: To determine the position of an object, we must know the direction of this object in another object.
And how far it is from the original object, so as to determine this.
So the answer is: direction, distance.
Comments: This question examines two main factors that determine the position of an object.
7. The three digits of (4 points) are 999, and the smallest five digits are 10000. Their sum is 10999, the difference is 900 1, and the product is 9990000.
Analysis: According to the meaning of the question, all three digits are 9, that is, 999, the smallest five digits are 1, and the rest are 0, that is, 10000, and then their sum, difference and product can be calculated respectively.
Answer: The three digits of the solution are 999, and the smallest five digits are 10000.
Their sum is: 999+ 10000= 10999,
Their differences are: 10000-999 = 900 1,
Their product is: 999? 10000=9990000,
So the answer is: 999, 10000, 10999, 900 1, 990000.
Comments: The key to solving this problem is to know what the three digits and the smallest five digits are, and then answer according to the meaning of the question.
8.(2 points) The school is located at 35 north of Xiaolijia. Direction 1 km away, Xiaolijia 35? The distance is 1 km.
Analysis: According to the relativity of positions, they are in opposite directions, with equal angles and equal distances.
A: A: According to analysis:
The school is at 35 north of Xiaoli's home. Direction 1 km away, Xiaolijia 35? The distance is 1 km.
So the answer is: 35 west? , 1 km.
Comments: This question mainly examines students' mastery of the relativity of position, and drawing is easier to answer.
Express the math midterm questions in the second volume of the fourth grade
First, write the number directly.
380+320= y+y= 56？ 78? 0= 25? 14-25? 10= 120? 5? 4=
1000? 125= 90? 70= n？ N= 37 ten 68? 0= 132-65-35=
5? Answer? b= 98+ 17= 103？ 40= 7b+5b= 157+ 102=
Second, fill in the blanks
1. Mid-term math test in the second volume of Grade Four: A decimal consists of two tenths, five tenths and nine percent, and this decimal is ().
2.5.46 consists of () 1, () 0. 1 and () 0.0 1.
3. The area formula of rectangle expressed by letters is S= ().
4. A book costs one yuan, and it costs () yuan to buy 40 such books.
5. A factory used to burn X tons of coal every t days, and a ton every day, with () tons left.
6. The average value of three consecutive natural numbers is n, and the other two numbers are () and () respectively.
7. One acute angle in a right triangle is 40 degrees, and the other acute angle is () degrees.
8. The product of the smallest three digits and the largest two digits ().
9. At 9 o'clock on the clock face, the angle between the hour hand and the minute hand is () degrees. From 1 point to 2 o'clock, the minute hand rotates at () degrees.
The number of 10.A is 7 times that of B, 360 more than B, and the number of B is ().
The letter 1 1. indicates that the multiplication distribution law is ().
12. A fillet = () right angle = () flat angle.
13.25? 49? 4=(25? 4)? Law () is used in this operation.
14. Make a triangle with three sticks. Given that the lengths of two sticks are 10 cm and 5 cm respectively, the shortest length of the third stick is () cm.
15. Not calculated, fill in ○ or =
(40+4)? 25○ 1 1? (4? 25) 200- 198○200-200+2
16. Xiaohong forms a triangle with a length of 17 cm, and its sides may be (), (), ().
Third, the judge (right in brackets? , wrong number? )
1 squared. A must be greater than 2a ().
2. A triangle has at least two acute angles. ( )
3. The internal angle of a big triangle is larger than that of a small triangle. ( )
4. supplement? 0? Or remove it? 0? The size of the decimal remains the same. ( )
5.m？ M can be written as 2 m. ()
6. An angle less than 90 degrees must be acute. ( )
7. obtuse triangles and right triangles also have three heights. ( )
8. Adding and subtracting parentheses in the equation can change the operation order of this problem. ( )
9. The product of two numbers must be greater than their sum. ( )
10.468? 99+468=468? (99+ 1) ( )
1 1. The isosceles must be an acute triangle. ( )
12. All equilateral triangles are isosceles triangles. ( )
Select (put the serial number of the correct answer in brackets)
1. The two sides of the triangle are 3 decimeters and 4 decimeters respectively, and the third side must be shorter than () decimeters.
A.3 B. 4 C. 7
2.28+72? The result of 4 is () a.25a.b.46c.79.
3.0.7 includes () 0.0001.a.70b.700c.7000.
4. In a triangle, an angle is 65 degrees? , the other two corners may be ()
A.95? ,20? B. 45？ ,80? C.55？ 70?
5. An isosceles triangle with a vertex angle of 100? , the bottom angle is ()
A. 100? B. 40？ C. 50？
6. Cut a 20 cm thin iron wire into three sections and make it into a triangle. Which of the following cutting methods is ok? ( )
A.8 cm, 7 cm, 6 cm; B 13cm，6cm， 1cm；
C.4 cm, 9 cm, 7 cm; D. 10/0cm, 3cm, 7cm.
7. A triangle has at most () obtuse angles or () right angles, and at least () acute angles. You should choose ().
A. 1， 1，3
8. Xiaojun is counting 60? (4+2), copy the formula to 60? 4+2, so the calculation results of the two questions are different ().
A.5 B.7 C.8
9. Is it 76? 99 is based on ().
A. Multiplicative commutative law B. Multiplicative associative law
C. Multiplicative distribution law D. Multiplicative commutative law and associative law
10. There are two acute angles in the triangle, so the third angle ()
A. It is also an acute angle. B must be a right angle. C must be an obtuse angle. D cannot be determined.
1 1. A? 75=b？ 108 (A and B are not equal to 0), then ()
Not sure.
12. What is the minimum internal angle of a triangle? , then this triangle must be ()
A. acute triangle B. right triangle C. obtuse triangle D. equilateral triangle
5. Calculate by your favorite method.
8? (29? l25) 156？ l0l- 156 404？ 25
85? 199+85 420? (5? 7) 100? 27-27
168-52-48 125? 88 1300? 25? four
37+ 125+63+ 175 75? 56? 56? 28 688? 534+ 1 12
Sixth, draw a picture.
1. Draw an acute angle, an obtuse angle, a right angle and a rounded corner respectively, and mark the degree.
2. Draw the heights at the bottom of the triangle respectively.
3.
A
Other questions:
1. The bell rings for 4 seconds at intervals of 2 seconds.
(1) The bell rang x times. How long did it last from the bell to the end?
(2) When x=8, how long does this bell last from ringing to ending?
2. There are 5/kloc-0 white rabbits in the feeding group, and the number of white rabbits is four times that of black rabbits. How many white rabbits and black rabbits have you raised?
3.993+994+995+996+997+998+999=? How is it easier? Please write down the main process.
It takes six minutes to saw a piece of wood into three parts. If the sawing time is the same each time, how many minutes does it take to saw 7 segments?
Xiaoying borrows a novel from the library, reading 8 pages a day, reading half of it in 15 days, and reading 12 pages a day, which happens to be finished during the loan period. How many days does this book last?
? Answers to midterm questions in the second volume of fourth grade mathematics
First of all, the answer is abbreviated
Second, fill in the blanks
1.(20.59) 2.(5)(4)(6) 3.(ab) 4。 (40a)
5.(x-at) 6。 (n- 1)(n+ 1)。 (50? ) 8.(9900)
9.(90? )(30? ) 10.(60) 1 1.(a+b)c=ac+bc
12.(4)(2) 13. (multiplicative commutative law and associative law) 14. (6)
15. (=) (=)16. (5) (5) (7) (the answer is not unique)
Third, the judge.
1.(? )2.(? )3.(? )4.(? )5.(? )6.(? )7.(? )
8.(? )9.(? ) 10(? ) 1 1.(? ) 12.(? )
Fourth, multiple choice questions
1.C 2。 B 3。 C 4 explosive A 5。 B 6。 C 7。 B 8。 B 9。 C 10。 D 1 1。 A 12。 (A.B)
Five or six short answers
Seven, solve the problem
1.( 1) 5a+4b (2) 3 10m
2.90? 70-70? 7 =140m
3. 18? 5+20? 7=230 pages
4.( 1)2 16? 8? 9=3 (yuan) or 2 16? (8? 9)=3 yuan
5.(4+6)? 60=600 meters
6. Bus: (46+44)? 26=234 (yuan)
Bus: (32+28)? 26= 1560 (yuan)
7. 180-35? 2= 1 10?
8. 108+ 18? 12+108 =180 (piece)
Other issues
1.( 1)6x-2 (2)46 seconds
2. Black rabbit: 5 1? (4- 1)= 17 (only)
White rabbit: 17? 4=68 (only)
3.993+994+995+996+997+998+999
= 1000-7+ 1000-6+ 1000-5+ 1000-4+ 1000-3+ 1000-2+ 1000- 1
=7000-28
=6972
4.6? (3- 1)=3 (points) 3? (7- 1)= 18 (point)
5. 15? 8? 12+ 15=25 (days)
The midterm examination questions and answers in the second volume of fourth grade mathematics
1. Multiple choice questions: (Please fill in the serial number of the correct answer in brackets) 1 for each question, and ***5.
1. In the following formula, the multiplication and exchange law is used to make the operation simple ().
a、64？ 10 1 B、 125？ 66? 8 C、352？ 5? 2
2. One car carries 6 tons of rice at a time, and the same car adds 4 cars. It takes () times to transport 90 tons of rice.
a、3 B、4 C、 15
Xiao Fang jumps 453 times in 3 minutes and Xiao Ming jumps 286 times in 2 minutes. () Soon.
A, Xiao Fang B, Xiao Ming C, uncertainty method
4. Which of the following formulas is correct? ( )
a、99+ 1？ 23= 100? 23 B、20 1？ 50=200? 50+ 1 celsius, 75+34+66=75+ 100
5. The decimal number greater than 0.2 and less than 0.5 is ().
A, 1 B, 2 C, countless.
True or false: (Type it correctly in brackets? , wrong number? ) 65438+ 0 points for each question, ***5 points.
1. Decimal is smaller than integer. ( )
2.4? (25? 5)=25? 4+5? 4 ( )
Two twos in three. 20.02 has the same meaning. ( )
4. Only the equation of multiplication and division, multiply first, then divide. ( )
5. supplement? 0? Or remove it? 0? The size of the decimal remains the same. ( )
3. Fill in the blanks: (65438+ 0 points for each blank, ***20 points)
1.3.502 is pronounced as () and 0.036 is written as ().
2. The law of multiplication and distribution is represented by the letter ().
3. The third place to the right of the decimal point is (); 0.6 includes () 0.1; 0.78 contains () 0.0 1.
Multiply the sum of 4.30 and 23 by 46, the product is (), and the formula is ().
5. The decimal consisting of 3 1 and 5 is ().
6. When a number is multiplied by 0, the product is (), and when a number is added with (), the original number is obtained.
7. Fill in the appropriate decimal or fraction in ().
Score: ()
0 1 2 3 4
Decimal system: () ()
8. Fill in the numbers according to the algorithm.
125? (8? )=( 125? )? 13
9. Fill in the box? & gt？ 、? & lt？ Or? =? .
4.23kg 4.32kg 1.68 yuan 1.679 yuan.
6.02 6.002 3.5 3.50
Fourth, the calculation problem. (26 points)
1. Write directly. (8 points)
84? 2 1= 300-50? 5= 760- 10? 50= 45? (3? 5)=
0? 35= 200? 5? 4= 35-5? 6= 58? 0+987=
2. The calculation should be as simple as possible (18 points)
( 1)58? 72+28? 58 (2)3000? 125? eight
(3)486- 137-63 (4)432? 54+ 17? 54
(5)99? 78+78 (6) 125? 24
Fifth, draw a picture. (9 points)
Swing it and draw a figure from the front, left and top with a square piece of paper.
Sixth, solve the problem. (***35 points)
1. Mom took 600 yuan's money to the mall and bought a sweater with a price of 248 yuan and a leather bag with a price of 252 yuan. How much should I get back? (5 points)
2. The school bought 23 basketballs and volleyballs, each with 76 yuan and 24 yuan. How much did the school spend? (6 points)
3. Xiaoming's home is 768 meters away from school, and Xiaojun walks to school every day 12 minutes. At this rate, how many minutes will it take him to get to Li Hongjia, which is 1536 meters away from home? (6 points)
4. Class 4 (1) cleans up the white garbage in the community. Boys picked up 36 beverage bottles, while girls picked up 6 more than boys. How many beverage bottles did Class Four (1) pick up? (6 points)
The fruit shop has 36 boxes of bananas, each weighing 25 kilograms, which are sold to 4 yuan. How much can it sell? (6 points)
6. Each bag of rice weighs 50 kilograms, and each car can hold 160 bags. How many cars does it take to transport 32 tons of rice at a time? (6 points)
Reference answer
1. Multiple choice questions (5 points) 1. b； 2.a； 3.a； 4.c； 5.C
2. True or false (5 points) 1. ; 2.？ ; 3.？ ; 4.？ ; 5.？
Iii. Fill in the blanks (20 points)
1.3.502; 0.036;
leave out
3. Thousands; 6; 78;
4.2438; (30+23)? 46=2438
5.3.05;
6.0; 0;
7. Omission; 0.4; 2.9
8. 13; eight
9.& lt； & gt； & gt； =;
Four, the calculation problem (26 points)
1.(8 points) 4; 290; 260; 5;
0; 10; 3; 987。
2.5800; 3; 286; 926; 7800; 3000;
Verb (abbreviation of verb) (9 points)
Sixth, solve the problem. (35 points)
1. should be returned 100 yuan;
2. The school * * * costs 2300 yuan;
3. It takes 24 minutes to walk;
4. Class 4 (1) students * * * picked up 1 14 beverage bottles;
5. All sold out can sell for 3,600 yuan;