Mid-term examination paper on the second volume of fourth grade mathematics.
1. Fill in the blanks (65438+ 0 for each blank, ***28)
1. In order to keep families in poor mountainous areas warm for the winter, where did a truck transport the warm materials? Each shipment 15 tons, n times, * * * tons. When n=6, the truck carries () tons.
2, a factory burned for t days, burning a ton every day, burning () tons.
A book has m pages, and Xiaoming reads 8 pages every day. After reading it all day, there are () pages left.
4. The length of a rectangle is a, the width is b, the circumference is () and the area is ().
5, additive commutative law is represented by letters (), and the law of multiplication and distribution is ().
6. The base angle of an isosceles triangle is 75? The top angle of an equilateral triangle is (), each inner angle is (), the circumference is 24 cm, and the side length is () cm.
7. One acute angle in a right triangle is 40 degrees, and the other acute angle is () degrees.
8. Make a triangle with three sticks. Given that the lengths of two sticks are 10 cm and 5 cm respectively, the length of the third stick may be () cm.
9, triangle has the characteristics of ().
10 and 76.74 are pronounced as (); To the left of the decimal point? 7? In the () position, it means 7 (); On the right? 7? In the () position, it means 7 ().
1 1 and 0.079 are written as (), and the counting unit is ().
12, compare the size of the following groups of two numbers.
5.32 ○ 5.23 5.40 ○5.4 0.7 1 ○ 0.70 1 1
13 and 8.076 include () 1, () 0. 1 and () 0.0 1.
Second, discerning right from wrong. (10)
1、87? 20 1=87? 200﹢ 1 ( )
2. A right triangle has only one height. ( )
3, 3, the decimal number greater than 0.5 and less than 0.7 is only 0.6. ( )
4、a？ 2 and 2a have the same meaning. ( )
The longer the two sides of the angle are drawn, the greater the degree of the angle. ( )
Choose the correct answer and put the serial number in brackets. (6 points)
1. There are 48 people on the bus. People go down to A and up to B, and now there are () people on the bus.
48-a-b B.48+a-b C.48-a+b D.48+a+b
2. 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.
3, a 20 cm thin iron wire, cut into three sections, put together a triangle, which of the following cutting methods can be ()?
A, 8 cm, 7 cm, 5 cm; b， 13cm，6cm， 1cm；
C, 4 cm, 9 cm, 7 cm; D,10cm, 3cm, 7cm.
Four. Calculation (37 points in total)
1, write the number directly (6 points)
45+ 155= 25? 4? 17= 50? 2? 49=
567-77= 75? 3= 125? 8? 6=
2. How to calculate it simply (3 points for each question, ***27 points)
500-97 435? 8+565? 8 99? 83+83
69? 10 1 125? 24 25? 8? 4? 125
25+364 +75 8? (29? l25) 432 - 123 -77
3. Find the degrees of the following angles. (2 points for each question, ***4 points)
( 1)? 1=42? ,? 2=38? , beg? The degree of 3.
(2)? 1=28? ,? 2=62? , beg? The degree of 3.
Fifth, draw a picture. (***4 points)
Please draw a 70 with a vertex first. Angle, and then draw a 60-degree angle with b as the vertex. Then form a triangle. Finally, draw the height of the triangle with AB as the base.
ab blood type
Solving problems with intransitive verbs (***30 points, 6 points for each question)
1. On the way to the amusement palace, Xiaojun took 5 minutes to climb the hill, walking an average of one meter per minute; It took 4 minutes to go down the mountain, walking an average of B meters per minute.
(1) How many meters did Jun Yi * * * walk?
(2) When A = 30m and B = 40m, how many meters did Xiaojun walk?
Zhao Hua and Li Ming took part in the long-distance running. Zhao Hua runs 65,438+078 meters per minute on average, while Li Ming runs 65,438+053 meters per minute on average.
(1) How many meters does Zhao Hua run more than Li Ming in one minute?
(2) When a=8, how many meters did Li Ming run less than Zhao Hua?
3. Two construction teams, A and B, build a highway from both ends respectively. It takes 16 days for Team A to repair 53 meters and Team B to repair 47 meters every day. How long is this road?
4. The supermarket bought 12 boxes of children's toothpaste, 25 boxes each, and each box sold 4 yuan money. How much can these children's toothpaste sell?
5. An isosceles triangle with a vertex angle of 68 degrees. So, what is its base angle?
answer
1. Fill in the blanks (65438+ 0 for each blank, ***28)
1. In order to keep families in poor mountainous areas warm for the winter, where did a truck transport the warm materials? Each shipment15t, n times, * * * tons (15n). When n=6, the truck carries 90 tons.
2. A factory burned for t days, burning a ton every day and burning (at) tons.
A book has m pages, and Xiaoming reads 8 pages every day. After reading it all day, there are (m-8a) pages left.
4. The length of a rectangle is a, the width is b, the circumference is (2(a+b)) and the area is (ab).
5. The letter additive commutative law is (a+b=b+a), and the law of multiplication and distribution is ((a+b)? c=a？ c + b？ C) carry out the test.
6. The base angle of an isosceles triangle is 75? The vertex angle is (30? ), each inner angle of an equilateral triangle is (60? ), its circumference is 24 cm and its side length is (8) cm.
7. One acute angle in a right triangle is 40 degrees, and the other acute angle is 50 degrees.
8. Make a triangle with three sticks. Given that the lengths of two sticks are 10 cm and 5 cm respectively, the length of the third stick may be (the answer is not unique, just fill it in correctly) cm.
9. Triangle has the characteristics of (stability).
10 and 76.74 are pronounced as (76.74); To the left of the decimal point? 7? In the (tenth) position, it means 7 (tenth); On the right? 7? In the (tenth) position, it means 7 (tenth).
1 1, 0.079 (0.079), and its counting unit is (0.00 1).
12, compare the size of the following groups of two numbers.
5.32 ○ 5.23 5.40 ○5.4 0.7 1 ○ 0.70 1 1
13 and 8.076 include (8) 1, (0) 0. 1, (7) 0.0 1 and (6) 0.00 1.
Second, discerning right from wrong. (10)
1、87? 20 1=87? 200﹢ 1 (? )
2. A right triangle has only one height. ( ? )
3. Decimals greater than 0.5 and less than 0.7 are only 0.6. ( ? )
4、a？ 2 and 2a have the same meaning. ( ? )
The longer the two sides of the angle are drawn, the greater the degree of the angle. ( ? )
Choose the correct answer and put the serial number in brackets. (6 points)
1. There used to be 48 people on the bus, down to A and then up to B. Now there are (c) people on the bus.
48-a-b B.48+a-b C.48-a+b D.48+a+b
2. There are two acute angles in the triangle, so the third angle (D)
A. It is also an acute angle. B must be a right angle. C must be an obtuse angle. D cannot be determined.
3, a 20 cm thin iron wire, cut into three sections, put together a triangle, which of the following cutting method can (c)?
a、 1 1cm、7cm、2cmb， 13cm，6cm， 1cm；
C, 4 cm, 9 cm, 7 cm; D,10cm, 3cm, 7cm.
Four. Calculation (37 points in total)
1, write the number directly (6 points)
45+ 155=200 25? 4? 17= 1700 50? 2? 49= 4900
567-77=490 75? 3= 25 125? 8? 6=6000
2. How to calculate it simply (3 points for each question, ***27 points)
500- 103 435? 8+565? 8 99? 83+83
=397 =8000 =8300
69? 10 1 125? 24 25? 8? 4? 125
=6969 =3000 = 100000
25+364 +75 8? (29? l25) 432 - 123 -77
=464 =2900 =232
3. Find the degrees of the following angles. (2 points for each question, ***4 points)
( 1)? 1=42? ,? 2=38? , beg? The degree of 3.
? 3= 100?
(2)? 1=28? ,? 2=62? , beg? The degree of 3.
? 3=90?
Fifth, draw a picture. (***4 points)
Please draw a 70 with a vertex first. Angle, and then draw a 60-degree angle with b as the vertex. Then form a triangle. Finally, draw the height of the triangle with AB as the base.
ab blood type
Solving problems with intransitive verbs (***30 points, 6 points for each question)
1. On the way to the amusement palace, Xiaojun took 5 minutes to climb the hill, walking an average of one meter per minute; It took 4 minutes to go down the mountain, walking an average of B meters per minute.
(1) How many meters did Jun Yi * * * walk?
5a+4b
(2) When A = 30m and B = 40m, how many meters did Xiaojun walk?
Answer: 3 10 meter
Zhao Hua and Li Ming took part in the long-distance running. Zhao Hua runs 65,438+078 meters per minute on average, while Li Ming runs 65,438+053 meters per minute on average.
(1) How many meters does Zhao Hua run more than Li Ming in one minute?
( 178- 153)? a
(2) When a=8, how many meters did Li Ming run less than Zhao Hua?
Answer: 200 meters
3. Two construction teams, A and B, build a highway from both ends respectively. It takes 16 days for Team A to repair 53 meters and Team B to repair 47 meters every day. How long is this road?
Answer:1600m
4. The supermarket bought 12 boxes of children's toothpaste, 25 boxes each, and each box sold 4 yuan money. How much can these children's toothpaste sell?
Answer: 1200 yuan
5. An isosceles triangle with a vertex angle of 68 degrees. So, what is its base angle?
Answer: 56 degrees
answer
1. Fill in the blanks (65438+ 0 for each blank, ***28)
1、 15n 90
2. At
3、m-8a
4、2(a+b) ab
5、a+b=b+a (a+b)？ c=a？ c + b？ c
6、 30 ? 60? eight
7、50
8. The answer is not unique, just fill it in correctly.
9. Stability
10, one tenth of 76.740.
1 1、 0.079 0.00 1
12 、>; = & gt
13、 8 0 7 6
Second, discerning right from wrong. (10)
?
Choose the correct answer and put the serial number in brackets. (6 points)
C D C
Four. Calculation (37 points in total)
1, write the number directly (6 points)
200 1700 4900
490 25 6000
2. How to calculate it simply (3 points for each question, ***27 points)
397 8000 8300
6969 3000 100000
464 2900 232
3. Find the degrees of the following angles. (2 points for each question, ***4 points)
( 1)? 3= 100? (2)? 3=90?
Five, draw a picture (4 points)
Short answer
Solving problems with intransitive verbs (***30 points, 6 points for each question)
1，( 1) 5a+4b (2) 3 10m
2、 ( 1)( 178- 153)? One (2)200 meters
31600m
4 1200 yuan
5 degrees 56 minutes
Reference to the Mid-term Examination Paper in the Second Volume of Grade Four Mathematics
1. Fill in the blanks (0.5 points for each blank, *** 16 points)
1.65+360? (20-5), calculate () first, then (), and finally (), and the number is ().
2. Knowing the product of two factors and one of them, find the other factor and use () method.
3. According to the size of the triangle inner angle, it can be divided into (), () and (). An isosceles triangle is a symmetrical figure (), an equilateral triangle is (), and all three internal angles of an equilateral triangle are ().
4. 15+ 10=25 25? 3=75 1800? The comprehensive formula of 75=24 columns is ().
5.4 ? 12 + 24 ? 6 add parentheses, so that the operation order is: add? Except? Multiply. The formula in brackets is ().
6.25? 76+76? The first step of the simple method of 75 is (), using multiplication () (filling algorithm); Calculate 102? 78. We should take () as () first, and then use () (fill in the algorithm) to calculate.
7. One factor is 8 and the product is 72. To make the product 720, another factor should be (); The product is 75. If one factor is enlarged by 10 times and the other factor is reduced by 5 times, the product becomes ().
8. In an isosceles triangle, the vertex is 10? Then the base angle of this triangle is ().
9. To judge whether three sticks of 2 cm, 3 cm and 8 cm can form a triangle, it is only necessary to judge whether () is greater than ().
10. Fold a 36cm iron wire into an isosceles triangle with a base of12cm, so the top angle of the triangle is () degrees. In a right triangle, one of the angles is 28? The other acute angle is () degrees.
1 1. Xiaohua's position in the class is (3,3), Xiaolan's position in the class is (3,4), Xiao Fang's position in the class is (4,4), () sits in front of () and () sits on the left.
12. As shown in the figure, there are () triangles, () right triangles and () obtuse triangles.
Keep your eyes open. Put a tick in the brackets after the correct statement? , in parentheses after the wrong statement? ) (10)
1.(36? 4+ 1 1)? The operation order of 5 is calculated from left to right. ( )
2. In any case, if one factor remains unchanged, the other factor will be expanded by 5 times, and the product will also be expanded by 5 times ().
3. 105? 5=2 1 Suppose 105 is divisible by 5. ( )
4. Count 25? 32? 125, in order to make the calculation easier, we should use the multiplicative distribution law. ( )
A figure composed of three line segments is called a triangle. ( )
6. Any triangle has at most one right angle and at least one acute angle. ()
7. All equilateral triangles must be isosceles triangles, and isosceles triangles must be acute triangles. ( )
8. A right triangle can be an isosceles triangle. ( )
9. The sum of any two internal angles of a triangle must be greater than the third angle. ( )
10. Top angle 60? An isosceles triangle must be an equilateral triangle. ( )
Multiple choice questions (Choose the correct answer in brackets) (5 points).
1. The following problem () will make the calculation easier by using the law of multiplication and distribution.
A..35+78+65 B.76？ 125? 8 C.32？ 25? 125 D.98？ 45
2. In the following formula, the divisor cannot be divisible by the dividend ().
A.45? 1 B. 120？ 30 degrees. 300 degrees? 40 D. 108？ three
3. Which three of the following four sticks can't form a triangle ()?
①10cm 28cm 33cm 47cm
A.① ② ③ B. ② ③ ④ C. ① ② ④ D. ① ③ ④
4. In a triangle, one angle is 38 degrees, and the other two angles may be ().
A.65? 82? B. 79？ 72? .38 caliber. 1 14? D. 52？ 90?
5. When two numbers are multiplied, one factor is magnified 3 times, and the other factor is also magnified 3 times. Product ().
A. Zoom in 3 times B. Constant C. Zoom in 6 times D. Zoom in 9 times
Four. Calculation:
1. Write the number directly. (5 points)
95+ 125= 240? 60= 0? 1 1= 128? 4= 3 10-75=
460? 20= 75? 4= 420? 70= 4? 32? 5= 70? 20=
2. Write the following questions. (6 points)
305? 44= 2525? 25= 167? 67=
3. Calculate the following questions. If you can use simple methods, simply calculate them. (27 points)
10 1? 68 48? 125 344? 63+37? 344
98? 45 (25+20)? 4 ( 100+ 153? 3)? five
2 1? ﹝(75+ 153)? 38﹞ 130 1+405? 45 1300? 25? four
4. Column calculation. (6 points)
What is the product of (1)640 divided by 32, plus 18 and then multiplied by 10?
(2) What is the product of the sum of 35 and 25 multiplied by their difference?
Verbs (short for verb) solve problems. (5 points for each question, ***25 points)
1. Persian cat 1500g, African bear is heavier than Persian cat 12g. How many kilograms does African bear have?
2. In an isosceles triangle, one of the base angles is 44? What is the vertex angle of this isosceles triangle?
3. Both master and apprentice process 1000 pieces, master processes 20 pieces per hour, and apprentice processes 10 pieces per hour. They worked together 10 hours later, the master had something to go, and the apprentice did it alone. How many hours do apprentices need to work?
4. Garbage removal 1 ton, 15 yuan, and garbage removal by Master Zhang and Master Liu * * * 108 ton. Master Zhang cleans up 8 tons every day. After working for 3 days, Master Liu joined * * * for 6 days to complete the task. How much do Master Zhang and Master Liu get?
5.AB is 800 kilometers apart. Two cars, A and B, drive in opposite directions from AB respectively. A travels 30 kilometers per hour and B travels 50 kilometers per hour. After the encounter, car A stopped and car B continued to drive at the original speed. 12 How many kilometers are the two cars apart?
Answers in the second half of the fourth grade test
1. Fill in the blanks (0.5 points for each blank, *** 16 points)
1.20-5= 15 360? 15=24 65+24=89
Step 2 separate
3. Acute triangle, right triangle, obtuse triangle and triangle with equal sides?
4. 1800? ﹝( 15+ 10)? 3﹞
5.4 ? ﹝( 12+24)? 6﹞
6.76? (25+75) Associative Law 102 100+2 Multiplicative Distribution Law
7. Enlarge 10 times 150.
8.85?
9.2+3 = 5cm 8cm
10.60 62
1 1. Xiaohua Xiaolan; Xiao Fang Xiaolan
12.5 3 2
2. Judgment: (each question 1, *** 10)
1.？ 2.？ 3.？ 4.？ 5.？ 6.？ 7.？ 8.？ 9.？ 10.？ Three choices: (65438+ 0 points for each question, ***5 points)
1.C 2。 C 3。 D 4。 D 5。 D
Fourth; Calculation:
1. (0.5 points each, ***5 points)
220 4 0 32 235
23 300 6 640 1400
2. (2 points for each question, ***6 points)
13420 10 1 1 1 189
3. (3 points for each question, ***27 points)
6868 6000 34400
44 10 180 755
126 13 10 13
4. (3 points for each question, ***6 points)
( 1)(640? 32+ 18)? 10 = 380
(2)( 35+25)? (35-25)=600
Verb (abbreviation for verb) solves problems; (5 points for each question, ***25 points)
1. 1500? 12+1000 =19000g =19kg
2. 180-44-44=92 ?
3. 1000-(20+ 10)? 10=700 700? 10=70 hours
4. Master Zhang 8? (3+6)==72 tons 72? 15= 1080 yuan
Master Liu 108-72=36 tons? 15=540 yuan
5.800? (30+50)= 10 hour
50? (12-10) =100km
The fourth grade mathematics spring midterm examination paper brings the answer.
Fill in the blanks. (65438+ 0 points per space, 20 points; )
1, the first digit to the right of the decimal point is (), the third digit to the right is (), and the second digit to the left of the decimal point is ().
2. The decimal number consisting of five ones, six tenths, seven percent and 65438+ zero thousandths is ().
3.0.9 contains () 0. 1, and 2.78 contains () 0.0 1.
4. The product of the multiplication of two numbers is 2.488, in which the decimal point of one multiplier is moved two places to the left and the decimal point of the other multiplier is moved one place to the right, so the product is ().
5.3 tons and 50 kilograms = () tons and 35 cents = () yuan.
8.43 m = () m () cm 7 m 2 cm = () m.
6. 5.6 to 10 times is (), and the original number is 0.056.
7. 95? ( 18+525? The order of 25) is: the first step is (), the second step is (), and the third step is ().
8、4? 37? 25=37? (4? 25) is the application of () law.
9. Xiaojun is counting 68? (★+2) Copy the formula to 68? ★+2, so the calculated result is different from the correct value ().
Second, choose. (3 points for each question, 15 points; )
1、 1.76★? 1.76, ★ The maximum value is ().
a、5 B、4 C、9
2. Is it 76? It is () 99.
A, multiplicative associative law b, additive associative law c, multiplicative distributive law
3. School group performance, 400 boys and 340 girls, with 20 people in each row. How many lines do girls stand less than boys? The correct formulation is ().
340 pounds? 20-400? 20
b、20？ (400-340)
c 、( 400-340)？ 20
4, the following formula is correct ().
a、98？ 102=98? 100+2
b、35？ 98=35? 100-70
c、96？ (8+4)=96? 8+96? four
5. Among the following quantities, 1.3 decimeter is not equal to ().
a，0. 13m b， 13cm c， 1.03mm。
Third, calculation. (35 points; )
1, oral calculation. (each question 1 point, accounting for 14 points; )
328? 10= 0.28? 10= 5.64? 100= 12.5? 10=
0.089? 100= 3.7? 10= 54? 9? 8= 25? 4-27=
3? 7? 3? 7= 24? 12-24? 2= 96? 3? 100=
425+480= 25? 0+52= 76+ 14? 5=
2. Mixed operation. (3 points for each question, 9 points; )
176-27? 9 36+24? 8-56 3 18-( 18? 6+ 1 12)
3. Simple calculation. (4 points for each question, 12 points; )
68+256+232+ 144 6500? 4? 25
169-5-25-50
Fourth, solve the problem. (6 points for each question, 30 points; )
1, the school canteen bought 850 kg of rice, transported three cars, and left 100 kg. How many kilograms did three cars transport on average?
2. 32 boxes of apples, 20kg per box and 5 yuan per kilogram. How much are these apples?
3. The grain store delivered 200 bags of rice flour, 25 kg of flour and 50 kg of rice. How many tons of rice and flour have been shipped?
4. Hairtail is 6.80 yuan per kilogram, and children's tops are 29.90 yuan each. Mom bought 5 Jin of hairtail with 100. Is there enough money left to buy two coats?
A clothing factory wants to produce clothes for foreign sales. At present, 82 out of every 65,438+000 pieces of clothing have reached the first-class standard in the spot check. If there are 100 pieces in this batch of products, how many pieces meet the first-class standard?
Fourth grade math answer
fill (up) a vacancy
1, one in ten thousand; 2、 5.67 1; 3、 9 278;
4、 5、 3.5 0.35 8 43 7.2;
6, 56 100 times; 7. Division and multiplication; 8. combination; 9、 134
Second, choose
British Broadcasting Corporation
Third, calculation (2, 3 Note: There must be a calculation process, and one less step is 1 minute; )
1、 3280 28 564 0. 125 0.00089 0.37 48 73
1 240 3200 905 52 78.8
2、 173 172 98
3、 700 65 69
Fourth, solve the problem.
1.(850- 100)? 3=205 kg a:
2.32? 20? 5=3200 (yuan) one:
3.200? 25+200? 50 = 1500kg = 1.5t A:
4. 100-6.8? 5=66 (yuan) 29.9? 2=59.8 (yuan) 66 & gt59.8 Answer: