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Here are some online math papers for the seventh grade exam in junior high school.

1 、/ UpLoadFiles/Article/2007- 1 1/4947 _ 2007 1 10920442099628 . doc

2006-2007 school year seventh grade first semester midterm exam.

Scoring reviewer

Math test

Note to candidates: the examination time is 120 minutes, and the full score is 100.

[Foreword: Dear students, how time flies! It has been half a semester since you entered middle school, and you have grown up with the new curriculum. I believe that you have mastered a lot of new mathematics knowledge and ability on the basis of the original primary school, become smarter and know how to apply mathematics to solve practical problems. Now let's go into the examination room, think seriously and answer seriously. Success will belong to you, the master of mathematics learning. ]

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Can you fill it out quickly and accurately? (3 points for each small question, ***30 points)

The reciprocal of 1 It's _ _ _ _ _ _ _.

2. Comparison size: |- 1/3 | _ _ ∣- 1/2 ∣.

According to the forecast of 65438 by the Central Meteorological Observatory on February 29th, 2003, the lowest temperatures in the following four areas are Harbin-10℃, Hangzhou -5℃, Lanzhou -6℃ and Nansha -26℃ respectively. Please arrange these four temperatures as _ _ _ _ _.

There are about 28 million bacteria in a fly's stomach. This approximation is accurate enough to be expressed by scientific notation.

Xiaoming accidentally dropped the ink on the shaft when he was doing his homework. According to the numerical value in the figure, it is judged that the integer * * * covers the ink.

–6.5 –4 –3 –2 1 0 1 2 3 5 6

6. The corresponding point of rational number on the number axis is as shown in the figure, then | b | _ _ a.

7. How many squares are there in the 2×2 grid pattern shown in the figure?

How many squares are there in the 3×3 grid pattern?

How many squares are there in the 4×4 and 5×5 grid patterns?

A: ..

8. In the numbers of 3.67,0, 1,-13.48, -6, 18, the score of negative numbers is _ _ _ _ _ _ _ _ _ _ _ _; The positive score is _ _ _ _ _ _ _ _.

9. On the number axis, after moving the point representing–1to the right by 3 units, the number represented by the corresponding point is _ _ _ _ _ _.

Mathematics examination paper of the first semester of grade seven 1 page (***6 pages)

10. As shown on the right, it is a side expansion diagram of a dice, and it will be like this.

Five dice are put together as shown on the right, one on the back.

The sum of points and the sum of points on the left is _ _ _ _ _ _ _.

2. You can definitely choose the right one! (2 points for each small question, ***22 points)

1. If, then the relationship between and is ................................. ().

A is equal, B has the same sign, C has the opposite sign and D is the opposite number.

2. In the following statement, ................................................ () is incorrect.

A. The numbers equal to its reciprocal after being squared are 0 and b, and the numbers equal to its reciprocal after being cubic are 1 and.

C. Numbers whose absolute values are greater than their own are negative numbers. The number whose reciprocal is less than itself is

3. In four numbers -2, 3, 4 and -5, any two numbers are multiplied, and the largest product is ............ ().

a . 20 B- 20 c . 12d . 10

4. if x > 0, y < 0 and | x |

Negative number b positive number C 0 D cannot determine the symbol

5. If 2 km east is marked as +2 km, then -3 km means ................................. ().

A. Go 3 kilometers east. B. Go 3 kilometers south. C. Go 3 kilometers west. D. Go 3 kilometers north.

6................................................( )

A.8b.c.1d. None of the above answers are correct.

7. Known: a & gt0b <; 0 | a |<| b |< Then 1 ...................... () is the person who correctly judges the following situations.

a . 1-b & gt； -b & gt； 1+a & gt； a b . 1+a & gt； a & gt 1-b & gt； -B.

c . 1+a & gt； 1-b & gt； a & gt-b d . 1-b & gt； 1+a & gt； -b & gt； a

8. Approximate value 0.03020 The number and accuracy of significant figures are ...................................... () respectively.

A, four, accurate to the hundredth, B, three, accurate to the hundredth.

C, three, accurate to ten thousand D, four, accurate to ten thousand.

9. On the number axis, the points representing numbers A and B are as shown in the figure, so the following judgment is correct: .................. ().

a、a+b>0 B、a+b0 D、│a│>│b│

10. If the rational numbers x and y are satisfied, the value of xy is equal to ................... ().

A.- 1 B. 1 C.-2 D.2

The seventh grade first semester mathematics examination paper page 2 (***6).

1 1. Cut a cuboid with a plane, and the section shape can't be .................................................................... ().

A. quadrilateral pentagon hexagon heptagon

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Well, it's time for us to do the calculation. I believe that you can solve these problems smoothly through careful calculation. Please pay attention to the symbol problem and find the necessary calculation steps. (6 points for each small question, ***24 points)

1.

2.

3.

4.

The seventh grade first semester mathematics examination paper page 3 (***6).

Scoring reviewer

Do it, I believe you can finish it! (6 points for each small question *** 12 points)

1. Represents the following numbers on the number axis and arranges them in descending order.

Connect to "

2. As shown in the figure, this is a top view of a geometric body composed of small cubes, and the numbers in the small squares indicate the number of small cubes in this position. Please draw its front view and left view.

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5. Change your expression and stop messing around! (The first question is 6 points, the second question is 6 points, *** 12 points)

1. If "triangle" refers to operation a-b+c, "box"

Represent the operation x-y+z+w, find the operation represented by x, and calculate the result.

A motorcycle factory plans to produce 300 motorcycles every day this week. Because workers take turns off, the number of people who go to work every day is not necessarily equal. The actual daily output is compared with the planned quantity as follows (the number of vehicles increased is positive and the number of vehicles decreased is negative).

Monday, 23456

Increase or decrease -5+7-3+4+ 10-9-25

The seventh grade first semester mathematics examination paper page 4 (***6).

(1) How many motorcycles were produced this Wednesday?

(2) Is the total output this week increased or decreased compared with the planned output? How much is missing?

(3) How many more cars were produced on the day with the most production than on the day with the least production?

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6. Explore the problem, see the problem, and don't be confused! (Each small question 10, ***20)

1.( 1) Compare the following sizes: |-2 |+| 3 | _ _ _ _ |-2+3 |;

|— |+|— | ________ |— |; |0|+|—5| __________ |0—5|; ……

(2) By comparing (1), please analyze and summarize the relationship between |a|+|b| and |a+b| when both a and b are rational numbers.

(3) According to your conclusion in (2), find the value range of x when | x |+5 = | x-5 |.

The seventh grade first semester mathematics examination paper page 5 (***6).

2. Observe the following equation and answer the questions:

; ; ; ; …

(1) Fill in the blanks: (n is a positive integer);

(2) Calculation: …

Friendly reminder: congratulations, you have finally finished the exam. Please check it again carefully, but be careful!

Patience+perseverance = success

The seventh grade first semester mathematics examination paper page 6 (***6).

2006-2007 school year seventh grade first semester midterm exam.

Math test

Reference answer:

Fill in the blanks: (3 points for each question, ***30 points)

1.+5/3 2。 < 3。 26 degrees Celsius =5 degrees Celsius =-6 degrees Celsius =- 10 degrees Celsius 4 .2.8× 107 V. 10 6.> 7。 5 14 30 55 8。 - 13.48 -2/3 9。 +2 10。 17, 15

There is only one correct answer to every question. Please fill in the correct answer in the corresponding form. 2 points for each question, ***22 points)

The title is123455678911.

Answer D D C A C B D A B A D

Third, the calculation questions: (6 points for each small question, ***24 points)

1. (step omitted) 3/4

2。 =(7/4—7/8—7/ 12)×(—8/7)

=7/4×(—8/7)—7/8×(—8/7)—7/ 12×(—8/7)

=—2+ 1+2/3

=— 1/3

3.=—9—9×(—2)—[(—2)× 1]

=—9+ 18+2

=2 1

4.=[50—(7/9— 1 1/ 12+ 1/6)×36]÷49

=[50—(7/9×36— 1 1/ 12×36+ 1/6×36)]÷49

=[50—(28—33+6)]÷49

=(50— 1)÷49

=49÷49

= 1

4. Do it (6 points for each small question *** 12 points)

1. solution: -3.5

Step 2 sketch

5. Change your expression and stop messing around! (The first question is 6 points, the second question is 6 points, *** 12 points)

1. operation: (1/4-1/2+1/6) × [(-2)-3+(-6)+3]

Results: = (- 1/2) × (-8) = 2/3.

2.( 1) 297 vehicles (2) decreased, of which 2 1 vehicle (3) decreased by 35 vehicles.

The answer to the first semester math test paper in grade seven is 1 page (page ***2).

6. Exploration questions (65438+ 00 points for each small question, ***20 points)

1.

( 1) 〉= =

(2) The sum of the absolute values of two numbers is greater than or equal to the absolute value of the sum of two numbers. That is, when both a and b are rational numbers, | a |+b | ≥| a+b |. (3)x≤0

2.( 1): 1/n- 1/(n+ 1)。

(2): The original formula =1-1/2+1/3+1/3+…+12002-/kloc-0.

= 1- 1/2003=2002/2003