I. Be a "little judge". Carefully judge. (Put a tick in parentheses if you are right, and an x if you are wrong.) 5 points
1, the right figure in a *** have 5 . ( )
2. The radius of a circle is of its circumference . ( )
3, from the school each home, Xiaoying with 10 minutes, Xiaoming with 8 minutes, Xiaoying and Xiaoming's speed ratio is 4:5. ( )
4, the flour is 45 tons less than the rice, if the rice and flour are sold 40% each, sold rice is 45 tons more than the flour. ( )
5. There are 40 correct and 4 incorrect math problems, and the error rate is 10%. ( )
2. Compare repeatedly and choose carefully. (Put the number of the correct answer in parentheses.) 5 points
1. The perimeter of the figure on the right is ( ) meters.
①25.7 ②31.4 ③15.7 ④39.25
2. The number of boys is as many as the number of girls , then the number of girls is as many as the number of boys ( ).
① ② ③ ④
3. 960 kilograms of apples were shipped to the store, which weighed more than the pears shipped, and how many kilograms of pears were shipped? The correct formula is ( ).
①960 × (1 + ) ②960 × (1 - ) ③960 ÷ (1 + ) ④960 ÷ (1 - )
4, A and B two people processing the same parts, A processing a part with hours, B processing a part with hours, 1 hour two people **** processing ( ) parts.
1 ① 5 ② 6 ③ ④1
Three, carefully review the questions, fill in the blanks accurately. 19 points (3 points for question 4, and 1 point for each of the remaining blanks)
1, = 0.125 = ( ) ∶ 32 = 8 ÷ ( ) = ( ) %.
2. 5 is more ( ) percent than 4; 4 is less ( ) percent than 5;
( ) is 40 percent more than 5; 5 is 40 percent less than ( ) .
3, the hour hand is 15 centimeters long, the minute hand is 18 centimeters long, the ratio of the distance traveled by the tip of the hour hand to the tip of the minute hand in a day and night is ( ).
4, a person's identity card number is 350627198601123312, then he was ( ) year ( ) month ( ) day born, is ( ) province ( ) county people.
5. Taking the school building as the starting point, walking eastward is positive, walking westward is negative, and Xiaohua's 6 meters walking westward should be recorded as ( ).
6. The number B is 87.5% of the number A. The number A:B = ( ), and if the number B is 56, the number A is ( ).
7. Every 100 grams of milk is known to contain 3.3 grams of protein, 4.0 grams of fat and 5.0 grams of carbohydrates. Jiajia drank 300 grams of milk in the morning, so he took ( ) grams of protein, ( ) grams of fat and ( ) grams of carbohydrates from it.
8, the school for the Arts Festival to select programs, to be selected from three choral programs in two, two dance programs in one. A *** have ( ) kinds of selection program.
Four, I can draw, I can calculate. 9 points (2 + 2 + 3 + 2)
(1) Draw a circle with a diameter of 4 centimeters with O as the center;
(2) Draw the largest square inside this circle;
(3) The ratio of the area of the square to the area of the circle is ( );
(4) Draw all the symmetry axes of the figure you have drawn.
Five, the magic math show their hands. 31 points (9 + 4 + 4 + 6 + 8)
1, calculating the following questions, how to calculate how easy to calculate.
× ÷ + ( + ) × ÷7+ ×
2. Find the ratio. 3. Simplify the ratio.
∶ 0.25 ∶ 0.45 ∶ 500 kg ∶ tons
4, Find the unknown number χ.
5χ-0.7 × 3 = 6.6 ∶ χ = 5
5, Make a formula.
1) 80% of a number is 80, what is the number of?
(2) The ratio of the numbers A and B is 4:9, and the number B is 30 more than the number A. What is the number B?
Six, problem-solving approach. 31 points (5 + 5 + 5 + 5 + 5 + 6 + 5)
1, a wire is enclosed in a square, each side is 3.14 meters long. If it is enclosed in a circle, what is the area of the enclosed circle?
3. Bright Elementary School had 1,200 students last school year, graduated 215, and enrolled 180 new students. What is the approximate percent increase or decrease in the current school year compared to the previous year? (retain one decimal before the percent sign)
5, A, B two people race, A ran to the full place, B ran to the full place, this time A and B two people are separated by kilometers. Please answer:
1) How many kilometers is the whole race?
(2) If A runs an average of 200 meters per minute, how many meters per minute does B run?
(3) If B runs the whole course, how long will it take A to reach the finish line?
2. China has a population of 1.3 billion, and the ratio of the number of people in China to the number of people in the world is 1:5. what is the number of people in the world?
4、School library science and technology books account for 40% of the total number of books, story books account for 30% of the total number of books, story books than science and technology books less than 1,200. how many science and technology books?
6, the following is a company's business statistics chart according to the statistical chart to answer the question:
① ( ) the month of the smallest difference between income and expenditure.
②The difference between income and expenditure in September ( ) million dollars.
③ Income ( ) million dollars in the fourth quarter.
④ Average monthly expenses for the first half of the year ( ) million dollars.
⑤ The increase in income in the fourth quarter compared to income in the third quarter is ( ) percent.
Elementary School Math Grade 6 Final Papers Set 2
I. Consider carefully and fill in the blanks. (***22 marks.)
1, A 5-meter-long rope is cut into 10 sections equally, each section accounts for ( ) of the whole length, which is ( ) meters.
2. When the radius of a circle is enlarged by a factor of 2, the circumference is enlarged by a factor of ( ) and the area is enlarged by a factor of ( ).
3. 35 liters = ( ) milliliters 78.3 cubic decimeters = ( ) cubic meters
4. Fill in " & gt;" "<" "= ".
37 × 118119 37 23 ÷4173 23 3.5 35%
5. ( ) ÷ 8 = 12 : ( ) = 0.75 = 3 ( ) = ( ) (fill in the percent)
6. Circles have ( ) axes of symmetry, and rectangles have pairs of ( ) axes of symmetry.
7. The area of the largest circle drawn in a rectangle of length 8 centimeters and width 6 centimeters is ( ) .
8, as shown in the figure on the right, a rectangle is divided equally into 8 squares, the colored part of the figure accounts for ( ) % of the total area, if 37.5% of the total area is to be painted in red, then there are ( ) squares painted in red.
9. There are 50 students in class VI(3) today and 2 are on sick leave. The absence rate of class VI(3) today is ( ) percent and the attendance rate is ( ) percent.
10. The relationship between ( ) and ( ) can be clearly represented by a fan chart.
2. Read the questions clearly and calculate skillfully. (***18 points)
1. Write the score directly: (4 points)
67 × 56 = 310 ÷ 56 = 137 ÷ 26 = (23 )? =
2. Solve the equation: (4 points)
4X + 12 = 40 0.4X + 25% X = 26
3. Simplify each of the following ratios and find the value of the ratios: (4 points)
3.6 : 9 (find the value of the ratios) 45 : 23 (simplify the ratios)
4. Calculate each of the following problems, and simplify the calculations if you can. (6 points)
65 × 67 - 67 ÷ 5 74 ÷ (23 + 12 ) × 45
3. Choose carefully. (***5 points)
1, the following figures,folded to form a square ( )
A B C
2, 10 grams of salt are added to 150 grams of water, which makes up ( )
A, B, 10% C, 25%
3, a square, rectangle and circle have equal perimeters, and their areas ( ) is maximized.
A, square B, rectangle C, circle
4, configuration of a gift candy, the required milk sugar and chocolate mass ratio of 5: 3. Now to configure this gift candy, milk sugar and chocolate each 60 kg, so when all the milk sugar is used up, chocolate will ( ).
A, there is a surplus B, not enough C, can not be judged
5, "chicken and rabbit cage" problem is one of China's ancient mathematical problems, "Sun Tzu's Arithmetic" recorded in the title is this: "now there are chickens and rabbits in the same cage, on the top of the thirty-five head, the bottom of the ninety-four feet, asked the chicken and rabbit What is the geometry of each?" Students, you arrive at the result of this ancient famous question is ( ).
A, 23 chickens and 12 rabbits B, 12 chickens and 23 rabbits C, 14 chickens and 21 rabbits
Four, careful scrutiny, to determine the right and wrong. (***5 points)
1. An apple weighs 320 kilograms , or 15% kilograms. ( )
2. Master Wang made 98 parts all qualified, the pass rate is 98%. ( )
3, A ÷ = B × = C + (ABC are not 0), then A < C < B. ( )
4, two ribbons are a meter long, the first one is used to meters, the second one is used to . Then the second one is used to the length of . ( )
5. a is a number that is not zero, so a and 1a are the reciprocal of each other. ( )
5. Hands and brain, operation thinking . (***6 points)
1, make a semicircle with a diameter of 4 centimeters and find the circumference of this semicircle.
2. A shopping mall uses a carousel to conduct a lottery. The winning rate for the first prize is required to be 37.5% and
The winning rate for the second prize is 50%. Please color
the first prize area of the right carousel green and the second prize area blue. (2 points)
VI. Apply your knowledge to solve the problem. (5 points each)
1. Below is a statistical table of the household expenditures of Ma Ming's family in December. (Fill in the statistical table completely)
(1) His family's expenditure on leisure in December was 15 more than that on utilities , and how many dollars was his family's expenditure on leisure in December?
(2) What percent of his family's total expenditures in December was spent on food?
2. A factory used 5,400 tons of water in April, which is 20% less than in March, how many tons of water were used in March?
3. The ratio of the length to the width of the flag of the People's Republic of China is 3:2. If the width of the flag is 80 centimeters, what is its area in square centimeters?
4, there is a circular flower bed, the diameter is 30 meters, to lay a one-meter cobblestone path around it, how many square meters is the area of this path?
5, Xiaoming put 2000 yuan into the bank, whole deposit for three years, the annual interest rate of 5.40%, the interest tax rate is 5%, after the maturity, Xiaoming can take out how much money from the bank?
6. The school has 27 pairs of chess and checkers***, which can be used by 98 students at the same time. Chess is played by every 2 students and checkers is played by every 6 students. How many pairs of chess and checkers does the school have?
Bei Shi Da Edition 6th Grade Math Book Final Exam Paper Set 3
Class Name Marks
I. Fill in the blanks carefully (1 mark for each blank***16 marks)
1.3:0.5 reduces to the simplest integer ratio of ( ), and the value of the ratio is ( ).
2. In physical education class, the students formed a circle to play a game, the teacher stood in the center point, the circumference of the circle is known to be 18.84 meters, then the distance between each student and the teacher is about ( ) meters.
3.3.14, , and π are in order from smallest to largest ( ).
4. The area of the circle is ( ) square centimeters when the largest circle is cut from a square piece of paper with a side length of 10 centimeters.
5. Auntie Wang sends 600 yuan from the post office to her son, who is away at college, and the remittance fee is 2% of the amount sent. Auntie Wang should pay a remittance fee of ( ) yuan.
6. A CD-ROM has a circular recording surface, the diameter of the inner circle is 4 centimeters, and the diameter of the outer circle is 12 centimeters, the area of the CD-ROM's recording surface is ( ) square centimeters.
7. A watch is 30 dollars cheaper after 15% discount, its original price is ( ) dollars.
8. In an NBA basketball game, China's famous athlete Yao Ming *** shooting 25 times, 6 missed, his shooting "hit rate" in this game is ( ).
9. Sichuan earthquake-stricken areas to build simple tents of 50 square meters each, can be housed in 18 beds, Dujiangyan city of a township of about 90,000 people affected by the disaster, about the need for ( ) top tents, these tents cover an area of about ( ) hectares.
10. Xiao Ming's father's heart beats about 72 times a minute, and the heart expels 70 milliliters of blood for every beat, so the total amount of blood passing through the heart in an hour is about ( ) liters.
II. Careful Judgment (10 points)
1. A newly bred corn seed has a germination rate of 120%. ( )
2. 6 students play table tennis, every 2 people have to play a game, a *** to play 12 games. ( )
3. The value of a ratio remains the same when both the leading and trailing terms of the ratio are multiplied by the same integer. ( )
4. Circles and rings are axisymmetric figures. ( )
5. Ryo said, "I lost 10% of my body weight by taking part in many sports exercises during the summer vacation." ( )
3. Careful Selection (12 points)
1. In the following three-dimensional figure, Ling Ling sees ( ) from above.
A B C D
2. When the circumference of a circle is enlarged by three times, its area is enlarged by ( ).
A.3 B.6 C.9
3.Three wires of equal lengths are made into a rectangle, a square and a circle, ( ) has the largest area.
A. Rectangle B. Square C. Circle
4. "48% of a box of apples has been eaten" is the quantity ( ) as the unit "1".
A. the weight of the apples eaten B. the weight of the apples left over C. the original weight of the box of apples.
5.To describe the elevations of the five main peaks in China with a statistical graph, it is better to draw a ( ) statistical graph.
A. Bar B. Line C. Fan
6. People can't live without water. 47% of the water in an adult's body each day is obtained by drinking, 39% comes from the water contained in food, and 14% comes from the water released when the body oxidizes.
The most suitable choice ( ) statistical chart.
A bar B folded line C sector
IV. Careful Calculation (25 points)
1. Write the score directly. (7 points)
= = = = = = =
= = = = = = = =
= = = = = = = =
2. Calculate off the form (simplify if you can) (12 points)
3. Calculate in columns (6 points)
1) The number of A is 18, and the number of B is 18, what is the sum of the two numbers A and B?
2) 25% of a number is 15 less than 12 of a number, what is the number?
V. Graphics and Operations (8 points)
1. A city is going to build a flower bed in the center of People's Square to beautify the environment. The flower bed consists of two circles of the same size, and the two circles are connected by only one intersection point. Please design, according to the requirements of the drawing: first draw two circles of the same size (required two circles connected and only one intersection), and then draw the axis of symmetry of this figure. Note: the axis of symmetry to draw two (4 points)
2. First draw a figure or figures, and then use symmetry, translation or rotation, design beautiful patterns. (4 points)
VI. Problem solving (29 points)
1. The old poem "Spring" goes like this: Spring water fills the pool in spring, Spring enters the spring grass grows. Spring trees bloom with spring stamens, Spring rain accompanies the spring wind. Spring people drink spring wine, spring birds make spring colors. In this poem, the author is in love with spring, and he is full of vigor. The word "spring" appears a lot in the poem. What percentage of the total number of words in the poem is devoted to "spring"? (5 points)
2. The Spring Rain Mineral Water Factory delivers mineral water to an area in the earthquake-stricken region of Sichuan province, which has a population of about 120,000 people, each of whom needs two bottles of water per day. (5 points)
3. A semicircular teaching aid, its radius is 5 decimeters, its circumference is how many decimeters? What is the area in square decimeters? (6 points)
4. Sunshine Supermarket and Xinxin Supermarket are selling the same basketballs at 50 yuan, a week later, Sunshine Supermarket lowered its price by 15%, and then raised it by 30% a week later; Xinxin Supermarket raised its price by 15% two weeks after Sunshine Supermarket raised its price, Xiaogang wants to buy a basketball, which supermarket is more cost-effective for him to buy? (6 points)
5. The following is a statistical chart of the gold medals won by China and South Korea in the 9th - 15th Asian Games, please answer the following questions from the chart. (7 points)
1. In which Asian Games did China win the largest number of gold medals? In which Asian Games did the difference in the number of gold medals between the two countries differ the least? (2 points)
2. In the 14th Asian Games, what percent more gold medals did China win than South Korea? (4 points)
3. Based on the statistical graph, briefly analyze the performance of the two countries in these Asian Games. (1 points)
Bei Shi Da version of the sixth grade book of mathematics final exam paper No. 4 set
Class Name Grade
I. Read the questions carefully and fill in the blanks cautiously: (2 points for each sub-question, ***20 points)
1. According to the fifth national census statistics as of 00:00 July 1, 2000, the population of our country has reached 12,953,300,000 people, and the number reads as , omitting the words "the". The number is read as , omitting the "billion" bit behind the last number is about people.
2, 5 minutes and 24 seconds = minutes 302 cubic meters = cubic meters cubic decimeters
3, 18 and 24 of the greatest common divisor is , the least common multiple is .
4, the unit of fraction is the largest true fraction is , it is added to the unit of such a fraction is equal to the smallest prime number.
5. There are a tons of cement on a construction site, b tons are used every day, and after 6 days there are still tons left.
6, ( ) ÷ 8 = = 0.25 = ( ) % = ( ): 16
7, 3.14, 314%, pi, 3.14, the four numbers connected by the "& lt;" sign:
8, the circumference of the wheel must be certain, and the distance traveled is in proportion to the number of revolutions of the wheel ( ). .
9, The number of boys in class VI (1) accounts for the class , and the ratio of the number of girls to the number of boys is .
10, a cone along the diameter of the base evenly divided into two equal volume, the same shape, the surface area than the original increased by 96 square centimeters, the height of the cone is 6 centimeters, the volume of the cone is cubic centimeters.
Two, pay attention to the question, careful calculation: (***26 points)
1, directly write the number of points (0.5 points per question)
53 + 98 = 634-298 = 2.4 ÷ 0.04 = 125 × 8 =
640 ÷ 16 = 6 ÷ ＝ 1.29 -0.18 = 13-7.2-2.8 = 0.25 × 0.4 = 0.88 + 0.12 =
6.5 + 9.75 + 3.5 =
2. Calculate each of the following problems, and simplify if you can. (3 points each)
1) 912 ÷ 57 × 45 + 180 (2)
3) 38.5 - 15.38 + 61.25 - 4.62 (4)
3. Solve the equation. (3 points) 4. Equation: (3 points)
20% x - 1.8 × 4 = 0.8 24 plus its , the resulting sum removes 35, what is the quotient?
Three, compare carefully and choose carefully. (Choose the correct answer to the question number in parentheses) (2 points per question, *** 10 points)
1, 1 gram of medicine into 100 grams of water, the ratio of medicine to water is ( )
A, 1: 100 B, 1: 99 C, 1: 101
2, a commodity, raise the price by 10% and then reduce the price by 10%, when it is sold at a price compared to the original price, you think ( )
A, the price has increased B, the price has decreased C, the price is unchanged
3, the following figure, the axis of symmetry has only one figure is ( )
A, isosceles trapezoid B, circle C, rectangle D, parallelogram
4, if A x = B x ,then A ( )B.
A, greater than B, less than C, equal to
5, a certain commodity is sold at a price that is higher than the original price. p>
5. In a factory, the number of male workers is 60% of the number of female workers, and the number of male workers is less than the number of female workers by ( )% A, 60% B, 37.5% C, 40%
Four, please be a painter. (3 points per question, ***6 points)
1, Make the height of the trapezoid below and measure the lengths of the relevant line segments, then find the area.
2. Draw two triangles of equal area and different shapes and explain why.
5. Use your knowledge to solve the problem. (***38 points)
(a) only formula, do not have to calculate, (2 points per question, ***8 points)
1, a plastic rope is 4.5 meters long, the first time to cut off , the second time to cut off meters, how many meters of this plastic rope are left?
3, a pool equipped with a B two water pipes, single open a water pipe 20 minutes can be empty pool filled, single open B water pipe 30 minutes can be the whole pool of water discharge. If the two pipes open at the same time for a few minutes can be filled with the full pool of ?
2, the Anti-Japanese War Memorial Museum, 5 days to receive 2600 tourists, according to this calculation, in late August **** how many people received guests?
Small Jade on September 1 this year to save 400 yuan of New Year's money deposited in the bank, regular 3 years, the annual interest rate of 2.89%, ready to expiry of the interest donated to the hope that the project, when she can donate how much money?
(ii) answer the following application questions. (6 points per question, ***30 points)
1, Yongxin Agricultural Tools Factory to produce a batch of agricultural tools, the original plan was completed in 15 days, the actual production of 280 pieces per day, not only 12 days to complete the task, but also exceeded the 360 pieces. How many pieces were originally planned to be produced per day?
2, a house to be paved with square tiles, with a side length of 3 decimeters of square tiles need 96. How many bricks will be needed if a square brick with a side length of 4 decimeters is used instead? (Proportional solution)
3, there are 6 columns in the hall, the radius of the base of each column is 4 decimeters, 5 meters high, if each square meter needs to be painted 0.5 yuan, paint these 6 columns, a **** need to use the paint cost how many yuan?
4, the following chart is an automobile factory production statistics for the fourth quarter of this year.
Unit: cars
500
400
300
200
100
October November December
Look at the graph and answer the following questions:
1) The output of this automobile factory in the fourth quarter of this year is gradually .
(2) The production in November was less than the production in October .
(3) This factory made cars per month in the fourth quarter of this year.
(4) Ask and answer a question of your own.
5, buses and trucks from A and B at the same time, after 6 hours, the two cars meet, after meeting the bus another 4 hours to reach B, when the truck has traveled 120 kilometers. How many kilometers apart are the two places?
Bei Shi Da version of the sixth grade math book final exam paper No. 5 set
Score Readers
I. To go! I believe that smart you are the best!
The first thing we're going to do is fill in the blanks.
1, 2:0.75 into the simplest integer ratio is ( ), its ratio is ( ).
2. ( ):( ) = = ( ) ÷ 10 = ( ) %
3. A section of road is traveled by car A in 5 hours and by car B in 4 hours, so car B is traveling ( ) % faster than car A.
4. The circumference of a circle of 12.56 centimeters is divided into two semicircles, and the circumference of each semicircle is ( ) centimeters.
5. The simplest integer ratio whose ratio is 0.72 is ( ).
6. 20 kilograms is 20% lighter than ( ). ( ) meter is longer than 5 meters .
7, a job, started on June 1, was scheduled to be completed in a month, the actual construction, June 25 to complete the task, to June 30 over ( ) percent.
8, the ratio of the number A to the number B is 7:3, the quotient of the number B divided by the number A is ( ), the number A accounts for ( )% of the sum of the two numbers.
9. Pi is the ratio of ( ) to ( ).
10, 2/3 of the number A is equal to 3/4 of the number B. The simplest integer ratio of the two numbers A and B is ( ).
11, mom deposited 60000 yuan in the bank for one year, the annual interest rate is 2.25%, a year later mom from the bank **** retrieve ( ) yuan.
12, 30 boys and 28 girls, the number of girls is ( ) of the number of boys, the ratio of the number of girls to the number of boys is ( ), the number of boys is ( ) times the number of girls, the ratio of the number of boys to the number of girls is ( ), the ratio of the number of boys to the total number of boys is ( ), the ratio of the total number of boys to the number of girls is ( ).
13, two rectangles are equal in area, the ratio of the length of these two rectangles is known to be 8:5, the ratio of their widths is ( ).
14. The ratio of the lengths of the sides of two squares is 3:5, the ratio of their perimeters is ( ) and the ratio of their areas is ( ).
15. Xiaoming's father's monthly salary is 1840 yuan, in accordance with the relevant provisions of the personal income tax, more than 1200 yuan part of the individual income tax to be paid, then Xiaoming's father's monthly salary should be paid income tax ( ) yuan.
Score Readers
Two, I will choose: think twice before you go Oh, be careful of traps. I believe that you can do it!
(Put the serial number of the correct answer in parentheses)
1、The perimeter of a circle and a square are equal, and their areas are compared ( ）
A The area of the square is bigger B The area of the circle is bigger C It is the same as the same
2、When you put 20 grams of salt into 200 grams of water, the ratio of the salt to the brine is ( ）
A、1:10 B、1: 11 C, 10: 1 D, 11: 1
3, to produce the same number of parts, Xiao Zhang used 4 hours, Xiao Li used 6 hours, Xiao Li and Xiao Zhang's ergonomics simple ratio is ( ).
A 16 : 14 B 2 : 3 C 3 : 2 D 14 : 16
4, the number of A is twice the number of B, A is more than B ( )
A, 50% B, 100% C, 200%
5, a salt water contains 10% salt, the ratio of salt to water is ( ).
A. 1:10 B. 1:11 C. 1:9
Score Marker
Three, please decide right and wrong below. (Correcting the wrong ones will raise the grade.)
(Put a √ in parentheses for the right ones and a × in parentheses for the wrong ones.)
1, The number of A is equal to the number of B , and the ratio of the number of A to the number of B is 6 : 5 ( )
2, 10 grams of salt is put in 100 grams of water, and the weight of the salt is 10% of the weight of the brine. ( )
3. If A is 20% more than B, then B must be 20% less than A. ( )
4. The circumference of a circle is 3.14 times the diameter. ( )
Score Marker
4. Calculation questions:
1. Find the ratio
60 : 25 3 : 1.5 hours : 45 minutes
2. Simplify the ratio
18 : 24 : tons : 750 kilograms :
Score Marker
5. Hands-on work
1. Fill in the table.
2. Draw all the axes of symmetry of the following figures.
3. Complete the table below.
Conditions Conditions Problems Equations
Class I has 100 students Class II has 80 students What percent is Class II less than Class I?
How many students are in Class II? 100 × 25%
25% more than class 2 100 ÷ (1 + 25%)
How many students are in class 2? 100 × (1-25%)
25% of the number of students in class II How many students are there in class II?
Class 2 is 25% of class 1 100 × (1 + 25%)
4. In a math test, the scores of 50 students in each of classes A and B are as follows:
Class A: there are 2 students with less than 60 points, 4 with more than 60 points, 6 with more than 70 points, 15 with more than 80 points, and 23 with more than 90 points, of which there are 8 with perfect scores of 100. (Above 60 means including 60 points but not including 70 points)
Class B: There are 5 students with less than 60 points, 5 students with more than 60 points, 10 students with more than 70 points, 19 students with more than 80 points, and 11 students with more than 90 points, of which there are 3 students with full 100 points.
Please draw a statistical graph and then ask and answer at least five different types of questions based on the graph.
The questions I asked are:
VI. Solve the equations:
1. 30% χ = 90 2. χ + 20% χ = 40
Score Scribe
VII. Practical application. Let's experience the application of math in life. You have to be careful but don't make mistakes. Read the questions a few times before you do it.
1. A cotton field, last year's harvest of 30 tons of lint cotton, an increase of 5 tons over the previous year. By what percent did lint production on this cotton field increase?
2. Xiao Ming's home is 1,400 meters from the school, he rides his bicycle home every day, the diameter of the bicycle tires is 70 cm, if the bicycle turns 80 times per minute, how long can Xiao Ming get home?
3. Wang Gang deposits 10,000 yuan in a bank for 3 years at an annual interest rate of 2.7%. At maturity, Wang Gang should get the principal and interest of one *** how many yuan?
4. 200 saplings were shipped to the school, the teacher planted 10%, the rest of the 5:4:3 allocation to A, B, C three classes, C class to how many trees?
5. A dripping faucet wastes 10 liters of water a day, how many liters of water were wasted by this faucet in 2006? If there are 1000 such taps in Shenzhen, how many liters of water are wasted in a day?
2. Observe the series and complete the series: 1, 3, 8, 22, 60, ( ), 448.
3. When Ming was calculating multiplication, he accidentally wrote a factor of 24 wrongly as 42, so the result of the calculation is more than the correct answer ( )
A B C D
4. The difference in the ages of the two mothers and daughters is 28 years old, and the ratio of the mothers to the daughters is 3:1, so the daughter is ( ). : 1, then the daughter is ( )
A 16 years old B 15 years old C 7 years old D 14 years old
5. A square and a circle of equal perimeter, the ratio of side length to radius is ( ) : ( ), and the ratio of the area is
( ) : ( )
6. A piece of land in rectangular shape, the ratio of the length to the width is 5:3, and the length is more than the width by 24 meters, how much is the area of this piece of land? square meters?
7. Huang Ming and Zhang Liang have accumulated some pocket money, they have accumulated the number of money ratio is 9:5, in the donation activities, Huang Ming donated 48 yuan, Zhang Liang donated 20 yuan, then they count the number of money is equal to the number of money, Huang Ming originally how much money?