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- The unit length of the number axis in the figure is 1. Please answer the following questions: (1) If the numbers represented by points A and B are opposite to each other, then
- Read the following problem-solving process: calculation (- 15) (-) 6. Solution: original formula=(- 15) (-) 6 ①=(- 15
- A small ant starts from point A on the number axis and climbs right for 6 units to reach point B, then point B represents the number () A
- There are 20 baskets of Chinese cabbage, with each basket of 25kg as the standard, and the number of kilograms over or under is expressed by positive and negative numbers respectively, recorded as follows
- If the opposite number of x is 3, │ y │=5, then the value of x + y is () A. - 8B. 2C.8 or - 2D. - 8 or
- At 8:00 a.m., a person drives a car from place A, which is marked positive eastward and negative westward. The first four driving processes are recorded as follows
- If the corresponding points of two rational numbers on the number axis are on both sides of the origin, then the quotient of these two numbers must be () A. Positive number
- The point representing - 1.2 on the number axis is between () A. - 1 and 0 B. - 2 and - 1 C. 1 and 2 D. 0 and
- The following logarithms are opposite to each other: () A. - (+3) and+(- 3) B. - (- 3) and+(- 3)
- Among the following logarithms, the ones whose values are equal are () A. - 23 and (- 2) 3B. - 32 and (- 3) 2C. - 3 ×
- Arrange several potted flowers numbered l, 2, 3, 4,... as shown in the figure below. The flowers in the flowerpots are red, yellow, blue, and purple
- The area of Tiananmen Square is about 440000 square meters. Please estimate that one millionth of it is equivalent to () A
- During the "National Day" Golden Week, the number of tourists in Lushan Scenic Area every day during the 7-day holiday is shown in the following table (a positive number means that the number of tourists is higher than the previous one
- Among the following pairs, there is no opposite meaning: () A. winning 2 games and losing 3 games B. gaining 30000 yuan and losing 30000 yuan C
- It is known that x and y are opposite to each other, a and b are reciprocal to each other, and the absolute value of m is 3. Then the value is A.12B.10C
- Fill in the following numbers on the corresponding horizontal lines- 3.15,6,—7,0,-100,0
- Fill the following numbers in the corresponding blanks:+1, - 3.1, 0, - 3, - 1.314, - 17,. Negative numbers:
- The temperature of one morning was - 30C, which rose by 60C at noon and dropped by 70C at midnight, so the temperature at midnight was () A
- If, the relationship between a and b is () A.a=b B.a=bC. a=b=0 D.a=b or
- A submarine is performing a mission underwater. The location is recorded as - 50 meters. A shark is swimming 30 meters above it
- Let a be the smallest natural number, b the smallest positive integer, and c the largest negative integer, then the sum of a, b, and c is () A
- Calculation: (- 2) 100+(- 2) 101 is () A.2100B. - 1C. - 2D. - 210
- A farmer in Xinyuan, Siyang is going to use a 20 meter fence to form a rectangular sheepfold. The maximum area enclosed is_________
- In - (- 2), (- 1) 3, - 22, (- 2) 2, - ∨ - 2 ∨, (- 1) 2n (n is a positive integer
- Among the following numbers, 0.483, 3.14,,, 0.373373337... irrational numbers include () A.2
- In - | - 2 |, | - (- 2) |, - (+2),,+(- 2),, negative numbers have () A.2 B
- If a=- 32, b=- 3-2, c=(-) - 2, d=(-) 0, then () A.a < b < c < d
- In 2010, a viral influenza outbreak caused harm to the people. Scientists found that every 60
- In the following formula, (1) - 8 - 3=- 5, (2) 0 - (- 6)=- 6, (3), (4) (-
- The highest temperature in our county on February 13 is 9 ° C, and the lowest temperature is - 6 ° C, so the highest temperature on this day is higher than the lowest temperature
- Show the following numbers on the number axis and connect them with "<". - 3,0,4,-2,2.5
- (1) The reciprocal of - 5 is; (2) The opposite number of is; (3) The square of - 3 is; (4) - The absolute value of 2005 is
- Define an operation: a ※ b=a2-b2, then the value of (- 3) ※ (- 5) is () A.8B. - 8C
- The following calculation is correct: () A. (- 3) - (- 5) =- 8 B. (- 3) + (- 5) =+
- Li Xingxing, the shareholder, bought a batch of shares at 11.2 yuan per share last Friday. The following table shows the
- If "⊙" represents a new operation, its meaning is: a ⊙ b=ab - (a+b), please calculate the value in the following format. (
- Rational number,,, - (- 1), in which the number equal to 1 has () A. 3 B.4 C.5 D
- Show the following numbers on the number axis and arrange them in order from smallest to largest. - 3.1,+5,-4,-
- A patrol car was patrolling on a north-south road. One day, the patrol car set out from sentry box A, and the north direction was positive
- The speed of light is about 3 × 10m/s. Calculate the time required for light to pass 7.8 × 10m (rounded to the percentile)
- Fill the following numbers in the curly brackets representing the number set:, - 3.123, 0, 23%,, 2011
- The correct one in the following statement is () A. Integer is also called natural number B.0 is an integer C. A number is either a positive number or a negative number D
- The reciprocal of is ____; The opposite number of is ____; The absolute value of the reciprocal of is ___________
- A car goes back and forth along a north-south road. One morning, it starts from A and arrives at B at night. It is agreed to go north
- The correct one in the following statement is () A. 0 is the smallest number B. If two numbers are opposite to each other, then their absolute
- The highest temperature of a certain day in January this year in a city is 3 ℃, and the lowest temperature is - 4 ℃, so the highest temperature of that day is higher than the lowest temperature
- The weight of 10 students was measured by physical examination. Based on 50kg, the excess was recorded as positive, and the insufficient was recorded as negative. The results were as follows
- During the "Shenzhou VII" flight in space, astronaut Zhai Zhigang walked out of the capsule for 19 minutes and 35 seconds. He took off with the spacecraft
- The following statement is correct () A. If a is a rational number, then - a must be a negative number B. If a number is a rational number, then it
- Taxi driver Xiao Li's operations in the afternoon one day were all carried out in the east and west of Renmin Avenue. If it is stipulated that the direction east is positive, and the direction west
- The following patterns are spliced from small squares of the same size according to certain rules. The first pattern has a small square
- Add 1 one at a time from - 55 to get a series of numbers: - 54, - 53, - 52,..., (1) the 100th integer
- A store owner recorded the monthly profits in the first half of this year as follows: the profits in January, February, May and June were 130000 yuan, 1
- If the sum of two numbers is positive, then at least one of the two numbers () A. is positive; B. Only one is positive; C. There is one
- The standard quality of each bag of Bright milk powder is 454g. In the quality inspection, if the standard quality is exceeded by 2g, it will be recorded as+2g. If the quality is low
- In – 2,+3.5, 0,, – 0.7, 11, negative fractions have () A.l, B.2, C.3, D.4
- Show the following numbers on the number axis and connect them with "<" in the order from small to large. 3.5,-3.5
- The number of the following group in regular order: 1, 2, 4, 8, 16,... The 2011 number is () A.22011B
- The average score of a math test in Class 1, Grade 7 was 80. The math teacher took the average score as the benchmark, recorded it as 0, and took Bruce Lee
- - (+5) represents the opposite number of _____, that is, - (+5)=_______; - (- 5) means___
- By observing the following figures, we can find that there is one square in the first figure, five squares in the second figure, and the third figure
- There are 10 cases of apples. The standard weight is 25kg per case. The difference between the weight of each case and the standard weight (unit: kg) is as follows: 0
- The number of columns arranged according to a certain rule is..., and the ninth number of columns is________
- A maintenance team took a car along the highway maintenance line, and agreed that forward is positive and backward is negative. Walking from place A to finish one day
- Will be expressed as a decimal () A.0.00000000562B.0.000000
- The following statements are correct: ① the absolute value of rational number must be greater than 0; ② If the absolute values of two rational numbers are equal, then
- The correct one in the following statement is () A. There are 3 negative numbers greater than – 3. B. The number greater than – 2 and 3 is – 5C. It is 5 less than 2
- A point starts from the origin of the number axis, moves 5 units to the right, and then moves 8 units to the left
- The maximum and minimum temperatures of a place from January 1 to 4 this year are shown in the table below: Date January 1 January 2 January 3
- The meteorological observation data of the sounding balloon at a certain place shows that the temperature drops by about 6 ℃ for every 1 km increase in altitude
- A and B ran a 100 meter race. When A reached the finish line, B ran 97 meters. They decided to run again
- There are three kinds of bags for the same kind of washing powder of a certain brand. Each bag contains 400g, 300g and 200g of washing powder respectively
- If the distance between two points corresponding to two numbers with equal absolute values on the number axis is 8, then the two numbers are A., B,
- One or two trucks started from the supermarket, walked 3 kilometers east to Xiaohua's home, continued to walk 1.5 kilometers to Xiaohong, and then walked west
- Add the following line to a number axis, and then mark the following numbers on the number axis: – 3,+l,, - l.5, 6
- In the following statements, the correct one is () A. Integers with absolute values less than 1 are 0, 1B. Integers with absolute values less than 1 are - 1
- The taxi driver Xiao Zhang's operations in the afternoon one day were all carried out on the street to the west. If it is stipulated that the east direction is positive and the west direction is negative, he
- Balmer, a Swiss middle school teacher, successfully discovered the law from the spectral data,... and obtained the Balmer formula, thus opening up the spectral mystery
- -The opposite number of 3 is _______, the absolute value of - is ________, 2-1=______
- Fill the following numbers into the set to which they belong: 15, -, - 5,, 0, - 5.32, 2.. (1) Fractional set
- If (x+1) (y-2) (z+3)=0, the value of (x+1) (y-2) (z+3) is ()
- The international standard time (unit: hour) of Beijing and other five cities can be expressed on the number line as follows: if the international standard time of two cities is
- Xiao Ming handled 7 savings businesses in the bank this year: withdrawal of 9.5 yuan, deposit of 5 yuan, withdrawal of 8 yuan, deposit of 12 yuan, deposit
- There are the following numbers, 0.01, 10, - 6.67,, 0, - (- 3),,,, of which the common ones belong to negative integers(
- If it is a positive number, the following statement is correct: () A. a must be positive; B. a must be negative; C. a must not
- If the sum of two rational numbers is zero, then these two numbers must be () A. Both are zero B. At least one is zero C. One is positive,
- According to the relevant data of the "Fortune World Forum" held in Beijing this year, the average annual growth rate of China and India in recent years
- The correct reading of the formula is () A. minus 4 minus 2 minus 1 plus 2; B. - 4 minus 2 minus 1 plus 2; C.-4,-2,
- For the sum of any two real number pairs, it is specified that: at that time, there is; Operation "" is:; Operation "" is:. Set and are both real numbers, if
- In the original algorithm of real numbers, we add the new operation "+" as follows: when a ≥ b, a+b=b2; when a<
- Known l=1, l1=121,l11=12321,…, According to the above rule
- In the following statement, the correct one is () A. There is no maximum positive number, but there is the maximum negative number B. The maximum negative integer is C. Rational
- The following statement is wrong () A. All rational numbers can be represented by points on the number axis B. The origin on the number axis indicates that the number is 0C
- The financial revenue of a city in the first quarter of 2008 was billion yuan, which was expressed as A
- The average temperature of some cities in China on a certain day in December 2006 is shown in the table below (positive if the temperature is above zero, unit: ℃), then
- The integer whose absolute value is greater than 1 and less than 4 is ____________, and its sum is _________
- Collect 4 empty mineral water bottles to exchange for one. Now there are 27 empty mineral water bottles. How many bottles of mineral water can you drink at most?
- +2 is a pair of opposite numbers, please give it the actual meaning: ___________________
- It is known that a and b are opposite to each other, and c and d are reciprocal to each other, and (y+1) 4=0. Find y3+
- Li Ming bought 7000 shares of a company's stock last week at 27 yuan per share. The following table shows the daily rise and fall of the stock this week (unit:
- If the number a represented by point A on the number axis satisfies a=- a, then the position of point A on the number axis is A. the origin and B. the origin to the right of the origin
- The following statement is correct: [] A.0.720 has two significant figures. B.36000 is accurate to decimal places. C.300 has
- A bicycle factory plans to produce 1050 bicycles a week, with an average production of 150 bicycles a day. Due to various reasons
- Enclose several numbers with curly braces and separate them with commas, such as:,. We call them sets, and the numbers in them are called set's
- The following table shows the international standard time (unit: hour) of the five cities, so 9:00 am Beijing time on November 3, 2011 should
- For positive integers a and b, a new operation ⊙, a ⊙ b is equal to the product of consecutive b positive integers starting from a, for example, 2 ⊙
- A bookstore held a book promotion meeting, and each promotion staff sold 50 books as the benchmark. If the number of books sold exceeds the standard, it is positive. If the number of books sold exceeds the standard, it is negative
- The temperature of a certain place was - 7 ℃ in the morning, increased by 11 ℃ at noon, and decreased by 9 ℃ at midnight, so the temperature at midnight was ()
- The following patterns are spliced by small squares with side length as unit length according to certain rules. According to this rule, the fifth pattern is medium and small
- Given that=2,=3, and xy<0, the value of x+y is () A. 1 or - 1B. 5 or - 5C.5 or 1D
- If the number represented by point A on the number axis is, then the number represented by the point 4 units from point A is () A.B.C. or 1D
- The following statement about the number of 0 is wrong () A. The opposite number of 0 is 0A, the absolute value of 0 is 0C, 0 cannot be
- Known: points A and B are represented on the number axis respectively, ⑴ Fill in the following table according to the number axis: 6-6-6-62-1.5404
- The significant figures of the approximate number rounded are (). A.2, 1, 0B.2, 1C.2, 1, 0, 0, 0
- If it represents a rational number, then the value () A may be a negative number B. It cannot be a negative number C. It must be a positive number D. It may be
- On Sunday, taxi driver Xiao Zhang served as a volunteer to pick up tourists on east-west roads for free. The east direction is positive and the west direction is negative,
- The following statements are known: ① two numbers with opposite signs are opposite to each other; ② Two numbers with opposite signs and equal absolute values are opposite to each other
- The error in the following statement is that () the opposite number of A.0 is 0B. The opposite number of a number must be 0 or the reciprocal of the negative number C
- There is a piece of land with a total area of 100 mu in Zhanjiang City. A real estate developer bought the land at a price of 800000 yuan per mu, preparing to build a "harmonious flower"
- If a is a rational number that is not equal to zero, the result of formula simplification is A.0 or 1B.0 or - 1C.0D.1
- In cryptography, the content you can see directly is plaintext (real text), and the content obtained after some processing of plaintext is secret
- It is known that f (x)=1+, where f (a) represents the value of the algebraic expression when x=a, such as f (1)=1+, f (2)
- The following calculation is correct () A.-(-2)2=22B.(-3)2×()=-6C.-7-2=
- Arrange the positive integers 1, 2, 3, 4, 5,... according to the following rules: 12, 3, 4, 5, 6, 7, 8, 9,
- The following statement is correct: () A. Positive and negative numbers are opposite to each other; B. The opposite number is equal to its own number only 0; C.
- Now define two operations "" "". For any two integers,,, the result of 68 (35) is () A.60B
- On the surface of the moon, in the daytime, the temperature of the place where the sun vertically shines is as high as+127 ℃; At night, the temperature can drop to - 183 ℃.
- Observe the number in the following column: 1, - 2, 3, - 4, 5, - 6,... According to the rule you found, the number in 2012
- Fill the following numbers into the corresponding set. 1, - 0.20,, 325, - 789, 0, - 23.13
- Xiao Ming circled five numbers on the calendar in the shape of a cross. Their sum is 40, and the number in the middle is _________
- The altitude of A, B and C is 20 meters, - 15 meters and - 10 meters, so the highest place is higher than the lowest place(
- In the following statements, the correct one is that A.0 is the minimum number B. The absolute value of any rational number is a positive number C. The maximum negative
- The following statement is incorrect () A. The absolute value of any rational number is a positive number B.0 is neither positive nor negative
- Among the four known numbers: (― 1) 2005, - (― 1.5), ― 32, of which the number of positive numbers is (). A
- Observe the number in the following column and write the number on the horizontal line according to the rule. -; -; The number in 2010 is
- Xiaoming once drew three, three, seven and seven cards when he was playing some games. He was puzzled and believed that you are smart
- The highest temperature of a city on New Year's Day in 2009 was 12 ℃, and the lowest temperature was - 2 ℃, so the highest temperature on that day was higher than the lowest temperature
- Look at Table 1 to find the rules. Table 2 and Table 3 are selected from Table 1 respectively, then,=. 0123... 135
- (1) If four rational numbers a, b, c and d are satisfied, then the maximum value is. (2). The symbol "" represents an operation that
- The following statement is incorrect: () ① The square of any rational number is positive; ② The absolute value of any rational number is false
- The following is a series of interesting patterns arranged according to a certain rule. Please observe and think carefully. The 2007
- The number represented by the point on the number axis whose distance from the point representing - 3 is equal to 5 is [] A. - 8 and - 2B. 8 and - 2C
- The following figures are all connected by small squares with a side length of 1cm. According to the change rule of figures, the 2009 figure
- In winter, the indoor temperature is 12 ℃ and the outdoor temperature is - 2 ℃, so the difference between indoor and outdoor temperature is () A.14 ℃ B.12
- After replacing one of the non-zero numbers with the number 3 in - 0.1428 to maximize the number obtained, the number to be replaced is
- Xiao Ming circled three adjacent numbers on the calendar of a month, calculated that the sum of the three numbers is 78, then the arrangement of the three numbers must be
- A class randomly checked the final scores of 10 students. Based on 80 points, the excessive scores were recorded as positive numbers, and the insufficient scores were recorded as negative numbers
- The following statement is correct: A. Non negative numbers include zero and integers B. Positive integers include natural numbers and zeros C. Zero is the smallest integer D
- If, the following conclusion is true: () A. x=0 or y=0B. x, y is the same as C. x, y is different
- Definition operation: for any two rational numbers a and b, if ab=(a – 1) (b+1), the calculated value is () A
- In the following statement, the correct one is () A. Zero divided by any rational number gets zero B. The reciprocal is equal to its own rational number only
- Given that the multiplication of two numbers is greater than 0 and the addition of two numbers is less than 0, the sign of these two numbers is () A. Same positive; B. Co negativity; C.
- Can you play "24 o'clock"? Please select four numbers from the five numbers "2, - 3, 4, - 5, 6", and use the
- If a, b are rational numbers, then a · b=b · a is (▲) A. Inevitable event B. Impossible event C
- In the following statement, the incorrect one is () A. There is a minimum positive integer, but there is no minimum negative integer B. If a number is an integer, it is one
- Among the following groups, the unequal ones are () A. (- 3) 2 and - 32B. (- 3) 2 and 32C. (- 2
- Write the formula of one method (including
- The following table shows the average temperature of several cities in January of a year in China, of which the lowest temperature city is () Beijing, Wuhan, Guangzhou, Hal
- Fill the following numbers in the corresponding braces: ① 25 ② 0.875 ③ ④ ⑤ ⑥ ⑦ ⑧⑨ ⑩ Positive integer set: {
- The temperature of the refrigerator freezer is - 6 ℃. At this time, the temperature in the house is 20 ℃, so the temperature in the house is higher than that in the refrigerator freezer
- Express the following numbers on the number axis, and connect them with "<": - 3, - (- 4), 0, | -
- On the number axis, if point A represents number X, point B represents number - 5, and the distance between two points A and B is 7, then x=___
- The absolute value of the opposite number of is () A? B.2 C.? 2 D...
- How much do you know about "0"? The following statement about "0" is wrong: () A.0 is the smallest rational number; B.0 is an integer
- The indoor temperature is 20 ° C, and the outdoor temperature is - 1 ° C. The indoor temperature is A.19 ° CB. - 1 higher than the outdoor temperature
- A patient needs to measure his blood pressure every afternoon. The following table shows the change of his systolic blood pressure from Monday to Friday
- There is a column of numbers. Starting from the second number, each number is equal to the difference from the reciprocal of the previous number. If, it is A.201
- In the following statements, the correct one is () A. There is no minimum natural number B. There is no minimum positive rational number C. There is a maximum
- Draw the number axis completely, and indicate the following numbers on the number axis, and then connect them with "<" in the order from small to large- 3,
- The Three Gorges Project is a super large water conservancy and hydropower project with huge comprehensive utilization benefits of flood control, power generation, navigation, water supply, etc. Its flood control reservoir
- The following statements: ① - absolute value of number - positive number; ②- A - must be a negative number; ③ There are two numbers with an absolute value of 3
- Please specify a new operation "a ♁ b" suitable for any non-zero real number a, b, so that the following formula holds: 1 ♁ 2=2 ♁
- (6 points for this sub question) Fill the following numbers in the corresponding braces representing the set: - 2, π,,, - 0.3,
- The following types: ①; ②; ③; ④, The number of negative calculation results is []. A. 4 B.3 C. 2 D.1
- (6 points) In the Milky Way, the volume of star Antares is about 2.2 × 108 times that of the sun, and the volume of the sun is about
- The reciprocal of is _______, the cube root of is ________, and the absolute value of - 4 is________
- (10 points for this question) Respecting teachers and valuing education. On Teacher's Day, taxi driver Xiao Wang will pick up teachers on east-west streets for free. It is stipulated that
- If a+b=0, rational numbers a and b must be () A. Both are 0B. At least one is 0C. Two numbers are different signs D
- On the number axis, the number represented by the point whose distance from the point representing number one is 2 is () A1B3C ± 2
- Among the following numbers, the number of unequal groups is () ① (- 3) 2 and - 32 ② (- 3) 2 and 32 ③ (- 2)
- The number of pieces and the amount of money for purchasing 5 kinds of learning tools A, B, C, D, E are shown in the table below: then the total cost for purchasing each kind of learning tool is___
- The infrared wavelength emitted by an infrared remote control is 0.00000094m, and the number is
- The following conclusion must be correct (). A. The difference between two numbers must be less than the minuend B. The difference between two numbers is 0 C. One
- A road maintenance vehicle drove back and forth along a north-south road. One morning, it started from place A and finally arrived at place B at night, about
- (12 points for this question) If a positive integer can be expressed as the square difference of two consecutive even numbers, then this positive integer is called“
- On the number axis, the number represented by the point whose distance from the point is equal to 5 is () A.2B. ― 8 and ― 2C. ― 8D
- Fill in the blanks with ">", "<" or "=". (1)-0.021(2)--(3)+(-)-(+0.7
- In cryptography, you can directly see that the content is clear code, and the content obtained after some processing of the clear code is password. There is a password
- (This big question has 14 points in total) Subtopic 1: (1) Calculation - () 2 × 9-2 × (-) ÷ + 4 × (- 0.5) 2
- If the absolute values of two numbers are equal, the two numbers (). A. Equal B. Both are 0C. They are opposite to each other D. Equal or
- The following statement is correct: A. The sum of any two numbers is greater than any addend; B. The number with the largest absolute value is also larger; C. If the sum of two numbers is
- The following statement is correct: () A. Square is equal to its own number only 0 B. Cube is equal to its own number only ± 1C
- A wrong equation appears in a student's workbook. Please add "parentheses" or "absolute value symbols" or“
- A maintenance team took a jeep along the road maintenance section, agreed to go east as positive, set out from place A to finish the work one day, and kept walking records(
- Calculation (3 subtopics in total, 3 points for each question, 9 points in total) (1) (-) - 1 + (- 2) 2 × 50 (2) (- 3
- The approximate number 0.4708 is obtained by rounding. The following statement is correct () A. Accurate to ten thousand digits, three are valid
- Calculation and simplification (4 points for each question, 16 points in total) Subtopic 1: (1), Subtopic 2: (2), Subtopic 3: (3), Subtopic
- Define an operation:, where is a positive integer, and, represents the integer part of a non negative real number, for example,. If, then (). A
- Which of the following data is an accurate value? () A. The speed of the bus on the road is 60km/h. Our school
- Calculation (12 points for this question, 4 points for each question) (1) - 12012+() - 1 - (3.14 - π)