Second, multiple choice questions
1, known as the founder of modern mathematics in China is ().
A, Jiang Boju B, Su C, Jiang Lifu
2. Journal of Mathematics, the first mathematical journal in China, was founded by ().
A, Huang Qingcheng B, Sun Yirang C, Lushan Town
3. The international mathematician who wrote the inscription "Hometown of Mathematicians" for Wenzhou is (), and he also won the Wolf Prize.
A, B, Chen Jingrun C and China.
4, get 1989 Taiwan Province provincial authorities awarded the Jingxing medal is ().
A, Ke Zhao B, Xu Xianxiu C, Xiang No.5 Middle School
5. 1988 The "Who's Who in the World" received by the British International Biography Center is ().
A, Li Banghe B, Fang Dezhi C, Jiang Boju
6. Professor () won the Fields Prize, known as the Nobel Prize in Mathematics, and became the first mathematician in China to win the prize.
A, Jiang Lifu B, Chen Shengshen C, Qiu Chengtong
7. 1988 won the math prize, 1996 won the science and technology progress prize, and the mathematician who won the China math prize in 2002 was ().
A, Jiang Lifu B, Chen Shengshen C, Jiang Boju
8, in 2003, Shanghai awarded the title of the first science and technology hero is ().
A. Xiang B, Su C and Gu Chaohao
9. The earliest Mathematics Institute in China was founded by a famous educator () in the late Qing Dynasty.
A, Sun Yirang B, Li Ruifu C and Huang Qingcheng
10, the founder of China mathematical mechanization research is ().
A, Li Banghe B, Wu Wenjun C, Jiang Boju
1 1, 1958-1968 won the first Zhongshan Prize in Taiwan Province Province and the first book prize of the Ministry of Education of Taiwan Province Province ().
A, Xiang B, Yang Zhongdao C and Gu Chaohao
12, () is the first mathematician in contemporary China who was completely trained in China, and has won the attention of the international mathematics community with his scientific research achievements.
A, Fang Dezhi B, Qiu Chengtong C, Li Ruifu
13, currently a member of the discipline evaluation group of the 5th the State Council Academic Degrees Committee, won the first prize of scientific and technological progress of the State Education Commission and the fourth prize of the National Natural Science Award ().
A, Li Ruifu B, Bai Zhengguo C, Lu Shanzhen
Answer:
Second, multiple choice questions
1、C
2. A.
3. A.
4、B
5、B
6、C
7、C
8、C
9. Answer
10、B
1 1、A
12、A
13、C
2. Mathematical common sense multiple-choice questions
First, fill in the blanks:
1, () is an internationally recognized authority on geometry and the founder of the school of differential geometry in China.
2. () is a legendary figure and a self-taught mathematician.
3, with trigonometry, known as the "Lee Beon Triangle" and self-proclaimed "three books" is ().
4, the world's first person to conquer Goldbach conjecture is ().
5. () is the earliest and most fruitful sower of modern mathematics in China. "This is the Encyclopedia of China and Biography of Modern Mathematicians in China.
Second, multiple choice questions
1, known as the founder of modern mathematics in China is ().
A, Jiang Boju B, Su C, Jiang Lifu
2. Journal of Mathematics, the first mathematical journal in China, was founded by ().
A, Huang Qingcheng B, Sun Yirang C, Lushan Town
3. The international mathematician who wrote the inscription "Hometown of Mathematicians" for Wenzhou is (), and he also won the Wolf Prize.
A, B, Chen Jingrun C and China.
4, get 1989 Taiwan Province provincial authorities awarded the Jingxing medal is ().
A, Ke Zhao B, Xu Xianxiu C, Xiang No.5 Middle School
5. 1988 The "Who's Who in the World" received by the British International Biography Center is ().
A, Li Banghe B, Fang Dezhi C, Jiang Boju
6. Professor () won the Fields Prize, known as the Nobel Prize in Mathematics, and became the first mathematician in China to win the prize.
A, Jiang Lifu B, Chen Shengshen C, Qiu Chengtong
7. 1988 won the math prize, 1996 won the science and technology progress prize, and the mathematician who won the China math prize in 2002 was ().
A, Jiang Lifu B, Chen Shengshen C, Jiang Boju
8, in 2003, Shanghai awarded the title of the first science and technology hero is ().
A. Xiang B, Su C and Gu Chaohao
9. The earliest Mathematics Institute in China was founded by a famous educator () in the late Qing Dynasty.
A, Sun Yirang B, Li Ruifu C and Huang Qingcheng
10, the founder of China mathematical mechanization research is ().
A, Li Banghe B, Wu Wenjun C, Jiang Boju
1 1, 1958-1968 won the first Zhongshan Prize in Taiwan Province Province and the first book prize of the Ministry of Education of Taiwan Province Province ().
A, Xiang B, Yang Zhongdao C and Gu Chaohao
12, () is the first mathematician in contemporary China who was completely trained in China, and has won the attention of the international mathematics community with his scientific research achievements.
A, Fang Dezhi B, Qiu Chengtong C, Li Ruifu
13, currently a member of the discipline evaluation group of the 5th the State Council Academic Degrees Committee, won the first prize of scientific and technological progress of the State Education Commission and the fourth prize of the National Natural Science Award ().
A, Li Ruifu B, Bai Zhengguo C, Lu Shanzhen
Answer:
First, fill in the blanks:
1, Sue
2. Hua
3. Li Ruifu
4. Chen Jingrun
5. Jiang Lifu
Second, multiple choice questions
1、C
2. A.
3. A.
4、B
5、B
6、C
7、C
8、C
9. Answer
10、B
1 1、A
12、A
13、C
3. Find 30 primary school math multiple-choice questions (single choice) and find the speed. Thank you.
Select the topic 1 and put 0.
The number of 800 million rewritten as "10,000" is () A and 0. 80,000 b, 80 million c, 800 million d, 80000000 2, 2*3*6=36, 2, 3, 6 are all 36 () A, multiple b, prime factor c, common divisor d and divisor 3. The actual length of a part is 7 mm, but the length measured on the drawing is 3 mm.
5 cm, the scale of this picture is () a, 1:2 B, 1:5 C, 5: 1 D, 2: 14. Saw 13 meter long wire into four equal parts. Each segment is the original length () a, 13m B,12mc, 14 D, 1 12 5, two natural numbers, and the sum of their reciprocal is125. These two numbers are () a, 0 and 2 B, 1 and 1 C, 4 and 2 D, 3 and 66. If 2/3 of A equals 3/5 of B, then A: B equals () A, 6: 15 B, 10:. For a 56 cm circle, the distance between the two feet of the compass is () a, 2cm b, 4cm c, 12.
56 cm 8, Jianli hydrological station is used to measure the water level and its change () statistical chart. A, horizontal bar b, broken line c, sector 9, in which * * * has a line segment ().
A, three B's, four C's, five D's and six 10. The bottom area of a cylinder and a cone is equal, and the height of the cone is three times that of the cylinder. Then the volume of the cone () is the volume of the cylinder.
A, less than B, equals C, and greater than 1 1. A commodity increases its price by 10% first, and then decreases its price by 10%. Compared with the original () A, the current commodity price has increased by B, decreased by C, and kept 12 and 2700÷500 unchanged. The remainder is () a, 2 B, 20 C, 200 13. In the following figures, () a and 190 cannot be converted into finite decimals. 625*5。
8 58 *4。 2=0。
625*(5。 8 4。
2) () A, commutative law B, associative law C, distributive law 15, 9 1 1, they are multiplied and expressed in decimals, and the results that are accurate to one thousandth are () A and 0. 8 1 B、0 .
8 180℃, 0 .8 18 D, 0.
8 19 16, a cylinder, dug out the largest cone and became a container. The volume of this container is the original cylinder () a, 13 B, 23 C, 33 17, and the following fraction can be changed into finite fraction () a, 7 1 1 B, 760 C, 734 D, 735/kloc-. Then add () a, 6 B, 7 C, 8 D, 16 19 to the denominator. The radii of the small circle and the big circle are 2 cm and 5 cm respectively, and the area ratio of the small circle to the big circle is () a, 2:5 B, 4: 10 C, 4:25 D, 2. The order of 14 is () a, 313 >; π& gt； 3。
14 B、π& gt； 3 13 & gt； 3。 14 C、3 .
14 & gt； 3 13 & gt； π2 1, closest to 4. Integers of 080,000 are () A and 4.
08 1 B, 4080 1 C, 4089 1 D, 4080922, to make the four-digit 235□ divisible by 3, at least () a, 1 B, 2 C, 4 D, 523. The length of each conductor is () a, 120m b, 120 C, 15m d, 15 24. On the map, 1 cm represents a distance of 60 kilometers. The scale of this map is () a, 160 B, 1600000c, 16000 D, 16000000 25. Rewrite a*b=c*d into the proportional formula () a, A: B = C: D. A= b 1 1 B, 35a = 78b C, 4 * 3a = b ÷ 627. The volume of a grain depot is about 1500a, m b, m 2 c, m 3 d, l 28, 0. The counting unit of 375 is () a, 0.
1 B、0 .0 1 C、0 .
00 1 D, it cannot be determined that 29 or 5 kilograms of salt is dissolved in 20 kilograms of water, and the weight of salt accounts for () a, 45 B, 15 C, 14 30 brine, and the rectangle has () symmetry axis. A, 1 B, 2 C, 4 D, countless 3 1, two reciprocal quantities are ().
A, the product (1) of two quantities which are reciprocal to each other and are proportional to B, inversely proportional to C and disproportional is certain. 32、0。
The two decimal places reserved in 695 are () A and 0. 69 B、0 .
70 degrees Celsius, 0. On the seventh day, 0.
6033、7。 38 divided by 0.
The quotient of 2 1 is 35, and the remainder is () a and 0. 003 B、0 .
03 degrees Celsius, 0 .3 D, 334, 4 and 5 are cubes with a side length of one centimeter, with () a, prime number b, prime number c, prime factor d and factor 35, and their volumes are () cubic centimeters.
A, 6AB, 6a C, aad, a336, the volume of the cylinder is constant, and the height of the cylinder is inversely proportional to (). A, bottom perimeter b, bottom area c and bottom radius 37,3.
2 has () one percent. Answer, 3.
2 B, 32 C, 320 D, 320038, the bottom area and volume of cylinder and cone are equal respectively. If the height of the cone is 9 cm, the height of the cylinder is () A, 3 cm B, 9 cm C, 27 cm 39,0. 03 is rewritten as 0.
030, and the rewritten counting units are () a and 0. 1 B、0 .
0 1 C, 0 .00 140, 10, and then increase its 15, and it will be 3() A,1015m b, 945 C,/kloc.
A, 28 B, 29 C, 30 D, 3 1 leap year is a year divisible by 4 or 400. February in leap year is 29 days, and February in normal year is 28 days. There are 29 days in February of leap year, 366 days in a year, 28 days in February of normal year and 365 days in a year.
44. To make a8 a false score and a9 a true score, A should be equal to () a, 7 B, 8 C, 9 D, 10. Fractions with numerator greater than or equal to denominator are called false fractions, and fractions with numerator less than denominator are called true fractions. 45. When a is a number greater than 0, the smallest result in the following formula is () a, a*45 B, a÷45 C, a÷ 1 13 D, uncertain 46. The length, width and height of a cuboid are a meter, b meter and h meter respectively. If the height is increased by 3 meters, the volume of the new cuboid will increase. a，3ab B，3abh C，ab(h 3) D，abh 3347。 In the following figures, () A, square B, rectangle C, equilateral triangle D, circle 48 and the following four groups of numbers, () is a prime number.
A, 63 and 5 1 B, 16 and 40 C, 125 and 64 D, 15 and 130.
4. Ask the Primary Mathematics Education Edition to sort out the knowledge points and review the topics.
General review of primary school mathematics (all) Chapter 1 A concept of number and number operation (1) The meaning of integers 1 Natural numbers and 0 are integers.
When we count objects, two natural numbers, 1, 2, 3 ... The numbers used to represent the number of objects are called natural numbers. There is no object, which is represented by 0.
0 is also a natural number. Counting units one (one), ten, one hundred, one thousand, ten thousand, one hundred thousand, one million, ten million, one hundred million ... are all counting units.
The propulsion rate between every two adjacent counting units is 10. This counting method is called decimal counting method.
4-digit counting units are arranged in a certain order, and their positions are called digits. The divisible integer A of the number 5 is divisible by the integer B (b ≠ 0), and the divisible quotient is an integer with no remainder, so we say that A can be divisible by B, or that B can be divisible by A. ..
If the number A is divisible by the number B (b ≠ 0), then A is called a multiple of B, and B is called a divisor of A (or a factor of A). Multiplication and divisor are interdependent.
Because 35 is divisible by 7, 35 is a multiple of 7, and 7 is a divisor of 35. The divisor of a number is finite, in which the smallest divisor is 1 and the largest divisor is itself.
For example, the divisor of 10 is 1, 2,5, 10, where the smallest divisor is 1 0 and the largest divisor is 10. The number of multiples of a number is infinite, and the smallest multiple is itself.
The multiple of 3 is: 3, 6, 9, 12 ... The minimum multiple is 3, but there is no maximum multiple. Numbers in units of 0, 2, 4, 6 and 8 can be divisible by 2, for example, 202, 480 and 304 can be divisible by 2.
Numbers in units of 0 or 5 can be divisible by 5, for example, 5,30,405 can be divisible by 5.
The sum of the numbers in each bit of a number can be divisible by 3, so this number can be divisible by 3. For example, 12,108,204 can all be divisible by 3.
The sum of each digit of a number can be divisible by 9, and so can this number. A number divisible by 3 may not be divisible by 9, but a number divisible by 9 must be divisible by 3.
The last two digits of a number can be divisible by 4 (or 25), and this number can also be divisible by 4 (or 25). For example,16,404 and 1256 can all be divisible by 4, and 50,325,500 and 1675 can all be divisible by 25.
The last three digits of a number can be divisible by 8 (or 125), and this number can also be divisible by 8 (or 125). For example,1168,4600,5000, 12344 can all be divisible by 8, and 1 125,13375,5000 can all be/kloc-.
A number divisible by 2 is called an even number. Numbers that are not divisible by 2 are called odd numbers.
0 is also an even number. Natural numbers can be divided into odd and even numbers according to their divisibility by 2.
A number with only two divisors of 1 is called a prime number (or prime number), and the prime numbers within 100 are: 2, 3, 5, 7,1,13, 17. If a number has other divisors besides 1 and itself, then it is called a composite number. For example, 4, 6, 8, 9 and 12 are all complex numbers.
1 is not a prime number or a composite number, and natural numbers are either prime numbers or composite numbers except 1. If natural numbers are classified according to the number of their divisors, they can be divided into prime numbers, composite numbers and 1.
Every composite number can be written as the product of several prime numbers. Every prime number is a factor of this composite number, which is called the prime factor of this composite number. For example, 15 = 3 * 5, and 3 and 5 are called prime factors of 15.
Multiplying a composite number by a prime factor is called prime factor decomposition. For example, the common divisor of 28 factorization prime factors is called the common divisor of these numbers.
The largest one is called the greatest common divisor of these numbers. For example, the divisor of 12 is 1, 2, 3, 4, 6,12; The divisors of 18 are 1, 2,3,6,9 and 18. Where 1, 2,3,6 are the common divisors of 12 and 1 8, and 6 is their greatest common divisor.
The common divisor is only 1, which is called prime number. There are the following situations: 1 and any natural number is coprime. Two adjacent natural numbers are coprime.
Two different prime numbers are coprime. When the composite number is not a multiple of the prime number, the composite number and the prime number are coprime.
When the common divisor of two composite numbers is only 1, these two composite numbers are coprime. If any two numbers are coprime, they are said to be coprime. If the smaller number is the divisor of the larger number, then the smaller number is the greatest common divisor of these two numbers.
If two numbers are prime numbers, their greatest common divisor is 1. The common multiple of several numbers is called the common multiple of these numbers, and the smallest is called the least common multiple of these numbers. For example, the multiple of 2 is 2,4,6,8, 10, 12, 14, 16, 18. ...
If the larger number is a multiple of the smaller number, the larger number is the least common multiple of the two numbers.
If two numbers are prime numbers, then the product of these two numbers is their least common multiple. The common divisor of several numbers is finite, while the common multiple of several numbers is infinite.
(II) Meaning of decimals 1 decimals Dividing an integer 1 0, 100, 1000 ... The decimals, percentiles and thousandths can be expressed in decimals. One decimal place indicates a few tenths, two decimal places indicate a few percent, and three decimal places indicate a few thousandths ... A decimal place consists of an integer part, a decimal part and a decimal point part.
The point in the number is called the decimal point, the number to the left of the decimal point is called the integer part, and the number to the right of the decimal point is called the decimal part. In decimals, the series between every two adjacent counting units is 10.
The propulsion rate between the highest decimal unit "one tenth" of the decimal part and the lowest unit "one" of the integer part is also 10. 2 Classification of decimals Pure decimals: Decimals with zero integer parts are called pure decimals.
For example, 0.25 and 0.368 are pure decimals. With decimals: decimals whose integer part is not zero are called with decimals.
For example, 3.25 and 5.26 are all decimals. Finite decimals: The digits in the decimal part are finite decimals, which are called finite decimals.
For example, 4 1.7, 25.3 and 0.23 are all finite decimals. Infinite decimal: The digits in the decimal part are infinite decimal, which is called infinite decimal.
For example: 4.33...3. 14 15926 ... Infinitely circulating decimal: the decimal of a number.
5. Seek 20 interesting math multiple-choice questions urgently.
If you like interesting math problems, try Einstein's IQ test as follows: Question 17: 1 Suppose there is a pond with infinite water.
At present, there are two empty kettles with a capacity of 5 liters and 6 liters respectively. The problem is how to get 3 liters of water from the pond with only these two kettles.
Zhou Wen's mother is a chemist in Yulin Cement Plant. One day, Zhou Wen came to the laboratory to do his homework.
I want to go out to play when I'm done. "Wait, mom will test you on another question," she continued. "Look at these six glasses for laboratory testing. The first three are all water, and the last three are just empty.
Can you just move 1 cup and separate the cup filled with water from the empty cup? "Zhou Wen, who loves to think, is a famous cleverness in the school. She just thought about it for a while and then did it. Please think about it, how does "cleverness" work? Three boys fell in love with a girl at the same time. In order to decide which of them can marry the girl, they decided to duel with pistols.
Xiao Li's hit rate is 30%, and Xiao Huang is better than him, with a hit rate of 50%. The best shooter is Kobayashi, who never makes mistakes, and the hit rate is 100%. Because of this obvious fact, in order to be fair, they decided in this order: Xiao Li shot first, Huang Xiao second and Xiao Lin last.
And so on until there is only one person left. So which of these three people has the best chance to survive? What strategies should be adopted? There are two prisoners in the cell.
Every day, the prison will provide this cell with a can of soup for two prisoners to share. At first, these two people often have arguments, because one of them always thinks that the other has more soup than his own.
Later, they found a way to kill two birds with one stone: one person divided the soup and let the other person choose first. In this way, the dispute was settled.
But now there is a new prisoner in this cell, and now there are three people sharing the soup. New ways must be found to keep the peace between them.
What should I do? Press: Psychological problem, not logical problem 5. Put n round coins of the same size on the rectangular table. Some of these coins may not be completely on the table, and some may overlap each other; When another coin is placed on the table with its center, the newly placed coin will definitely overlap with some of the original coins.
Please prove that the whole desktop can completely cover 6 balls with 4n coins and a ruler with a length of about 2/3 of the ball diameter. How do you measure the radius of the ball? There are many ways to see who is smart. Seven five one-dollar coins of the same size. Require two-phase contact, what should I say? 8 Mr. S, Mr. P and Mr. Q all know that there are 16 playing cards in the desk drawer: spades A, Q, 4, flowers J, 8, 4, 2, 7, 3, diamonds K, Q, 5, 4, 6, A and 5.
Professor John chooses a card from 16 card, tells Mr. P the number of points in this card, and tells Mr. Q the color of this card. At this time, Professor John asked Mr. P and Mr. Q: Can you infer what this card is from the known points or colors? So, Mr. S heard the following conversation: Mr. P: I don't know this card.
Mr q: I know you don't know this card. Sir: Now I know this card.
Mr. Q: I know that, too. After listening to the above conversation, Mr. S thought about it and correctly deduced what this card was.
Excuse me: What kind of card is this? A professor who teaches logic has three students, all of whom are very clever! One day, the professor gave them a question. The professor put a note on everyone's forehead and told them that everyone had written a positive integer on the note, and the sum of some two numbers was equal to the third! The professor asked the first student: Can you guess your own number? Answer: No, ask the second, the third, the first, the second, the third: I guessed right, it was 144! The professor smiled with satisfaction. Can you guess the numbers of the other two? 10 A car accident occurred in a city. There are only two colors of cars in this city, blue 15% and green 85%. When the accident happened, someone saw him at the scene and testified that it was a blue car. However, according to on-site experts' analysis, the probability of correct conditions at that time was 80%. So, what is the probability that the car involved is a blue car? 1 1 A man has 240 kilograms of water, and he wants to transport it to the arid area to make money.
He can carry up to 60 kilograms at a time, and he needs to consume 1 kilogram of water per kilometer (even if it is water consumption). Assuming that the starting water price is 0, it is directly proportional to the transportation distance (i.e. 10km is10 yuan/kg, 20km is 20 yuan/kg).
), and assuming that he must return safely, how much money can he earn at most? 12 Now * * there are 100 horses and 100 stones. There are three kinds of horses, big ones; Medium and small horses.
A big horse can carry three stones at a time, a medium-sized horse can carry two stones, and a pony can carry two stones. How many horses do you need? (The key to the problem is to use up 100 horses)131= 52 =153 = 2154 = 2145, so 5=? 14 2n people lined up to enter the cinema, and the fare was 50 cents.
Of these 2n people, n people only have 50 cents, and the other n people have 1 USD (paper tickets). When the stupid cinema started selling tickets, there was no 1 cent.
Q: How many queuing methods can make the cinema get 50 cents change whenever a person with $65,438+0 buys a ticket? Note: A person with $65,438+0 = 65,438+000 owns paper money and cannot break it into two 50 cents. 15 A man spent eight yuan on a chicken, nine yuan. Ask him how much money he earned. 16 There is a sports competition * * * with m events, in which athletes A, B and C take part. The first place, the second place and the third place in each project were scored x, y and z respectively, where x, y and z are positive integers, and X >；; Y & gtz .
In the end, A got 22 points, B and C both got 9 points, and B won the first place in the 100 meters. Find the value of m and ask who is the second place in the high jump?
17: 1 has five houses and five colors. Every family has a different nationality.
6. Primary school mathematics multiple-choice questions (50 questions) are all self-generated, preferably the fifth-grade questions, the main topics and
1, with two decimal places to the tenth place being 5.
0, minimum quantity is []. Answer, 4.
99 B, 5. 1 celsius, 4.
94 D, 4 .95 2. Epiphyllum can last at least 4 hours, and the flowering time of wheat is 0.
02 times, about (). Answer, 0
Eight minutes b, five minutes c, zero. 08 minutes d, 4 minutes 3. In the following formula, () is an equation.
A, 25x B, 15-3= 12 C, 6x 1=6 D, 4x 7 4 and x=3 are the solutions of the following equation (). a、2x 9= 15 B、3x=4 .
5 C、 18 .8÷x=4 D，3x÷2= 18 5。 When A = 4, B = 5 and C = 6, the value of bc-ac is [].
There are 60 plants planted in Grade A, 1 B, 10 C, 6 D, 4 6, 5 and 4 plants are twice as few as those in Grade 4. Planting trees in the fourth grade [].
A, 26 B, 32 C, 19 D, 28 7, half of a and 4. The sum of 5 is expressed as [].
a、2a 4 .5 B、a \u 24 .
5 C、a \u 2—4 .5 D、2 \a4 .
5 8。 The area of a triangle is s square centimeters, and its height is 4 centimeters, so the base is [] a.
S÷2÷4 B .4 degrees Celsius.
2s \u 49 .X=4 is the solution of equation ().
[ ] A .24 x=28 B .
2x 3=5 degrees Celsius.8÷ 2x =1610.
Mom uses 0. 8 yuan bought 4 kilograms of Chinese cabbage at [] yuan per kilogram.
1 yuan can buy [] Jin of cabbage. Answer.
0。 2 B .
5 degrees Celsius .3.
2 1 1。 Two road construction teams combined to build a road. The first team built 36 kilometers of roads in 9 days, and the second team built 6 kilometers on average every day in 3 days. How many kilometers do the two teams build on average every day? The correct formula is.
[] A .(36 6) pounds (9 3) pounds.
(36 6 * 3)⊙(9 3) degrees Celsius. (36 * 9 6 * 3) ⊙ (9 3) D.
(36 6*3)÷2 12。 The formula of quotient less than dividend is [] a.
0。 45÷0。
8 B .35÷2。
5 degrees celsius. 5 degrees.
48÷0。 58 13。
Nail four pieces of wood into a rectangle and draw two opposite corners into a parallelogram. At this time, the area of parallelogram is larger than that of the original rectangle [] A. B.
The smaller C. has not changed. 14.
A three-digit decimal, and the approximate value obtained by retaining two decimal places is 1. 37. the original number may be [] a.
1。 364 BC.
1。 374 degrees Celsius.
1。 375 15。
A ÷ b = c...7. If both A and B are reduced by 10 times, the remainder is []. A, B, C, 0.
On the seventh day, 0 .07 16, right 6.
4* 10 1-6。 4 For simple calculation, [] will be used.
A, multiplicative commutative law b, multiplicative distributive law c, multiplicative associative law d, additive associative law 17. The quotient of 43 divided by a number is 8, the remainder is 3, and the equation for finding this number is [] A.
43÷x-3=8 B .(43-3)÷x=8 degrees Celsius.
8x 3=43 18. Two identical acute triangles can be combined into a _ _ _ _ _ _ [] a.
Rectangular; B. square; C.
Parallelogram; D. trapezoid 19.
Divide a parallelogram into two trapeziums at will, and the _ _ _ _ _ in these two trapeziums is always equal. [ ] A .
High; B. area; C.
The sum of up and down is 20. In the picture on the right, the areas of three figures between parallel lines are compared by [] a.
The area of parallelogram is large B. The area of triangle is large C.
The area of the trapezoid is very large. D. The areas are all equal, 2 1.
The parallelogram has a base length of 25cm, a height of 8cm and an area of [] a.100cm2 b. 。
200 cm 2 degrees Celsius. 200 cm 22.
The area of the triangle is 18dm2, the base is 6dm, and the height is [] a.3dmb. 。
6dm C .6 square centimeters 23
The sum of the upper and lower bottoms of the trapezoid is 40 cm, the height is 2 cm, and the area is [] a..40 square cm.
400 cm, 2 degrees Celsius. 8 dm24.
In a square rape field with a side length of 85m, the average amount of rapeseed per square meter is 0.5%. 05kg, this field * * * harvested rapeseed [] a.
4。 25 B .
17 C .36 1。
25 25。 Two () triangles can be combined into a parallelogram.
[] A. Equal bottom and equal height B.
Exactly the same, the area of C is equal to 26.
0。 63÷0。
The number of digits of the 5 quotient is. [ ] A .
Two b's and three c's.
Four d's and five 27' s.
At 0. Add a zero after the decimal point of 2, and this number is [] A.
Enlarge 10 times B. Reduce 10 times C.
Same size, 28. Add100g salt into100g water. At this time, salt accounts for () A of brine.
1/9 B.110 degrees Celsius.
1/ 1 1 1。 Uncle Wang is the manager of the school shoe sales department. The data representative that Uncle Wang is most interested in is ().
A. average B.
Median C. mode 2.
() can clearly show the relationship between each part and the whole. Answer.
Bar chart B. broken line statistical chart C.
Department statistics figure 3. Half of a long rope is cut off, and then the remaining half is cut off. At this time, the remaining part is 2 meters less than the truncated part. This rope was originally () meters long.
A.4 B.
3 degrees Celsius. 1 4.
The current price of a commodity 180 yuan is 2 1 yuan lower than the original price. How much is the current price lower than the original price? The column type is (). Answer.
21÷180b. (180-21) ÷180 degrees Celsius.
2 1÷( 180 2 1)。