The first volume of Grade One is a monthly exam simulation volume. Kneel down!

Junior high school seventh grade "Mathematics" the first month examination questions.

1. Fill in the blanks: this question is *** 10, with 3 points for each question and 30 points for * * *.

The difference between 1, 1 and-1 is _ _ _ _ _.

2, the reciprocal of the rational number m is, then its reciprocal is _ _ _ _ _.

3. The altitude of A is-22 m, and the altitude of B is-18 m, so _ _ _ is higher than _ _.

4. The distance on the number axis represents the number 2, and the number represented by the point of three units is _ _ _ _ _ _ _.

5. The distance between two points representing 3.2 and -7. 1 on the number axis is _ _ _ _ _ _ _.

6. Calculation: ①-1+2 = _ _ _ _ _ _, ② 2-2× = _ _ _ _ _ _ _, -32 = _ _ _ _ _ _ _.

7. If ∣ A- 1 │+│ AB-2 │+C2006 = 0, then A+B A+B+C = _ _ _ _ _

8.-999999 ≈ _ _ _ _ _ _ _ _ _ _ _ _ (two significant figures are reserved).

9. Survival period 1 1,000 yuan, monthly interest of 0. 1.5‰. After five months, the sum of principal and interest is _ _.

10. Observe the following formula and fill in the blanks: 32- 12 = 8× 1, 52-32 = 8× 2, 72-52 = 8× _ _ _, 92-() 2 = 8× 4. ...

(2n+ 1)2-(2n- 1)2 = 8×_ _ _ _ _ _。 (n is a positive integer)

Second, multiple-choice questions: (this question 10, 3 points for each question, * * * 30 points, and only one correct answer for each question)

1. The following number axis drawing method is correct ()

A b

C D

2, known as non-negative, then -a includes ().

A. positive numbers B. positive numbers and 0 C. negative numbers D. negative numbers and 0

3, the following statement is correct ()

Two numbers with opposite signs are opposite numbers. B. the inverse of a number must be negative.

C.-3 is the inverse of d, and 0 is itself.

4, a number is equal to the absolute value of its reciprocal, then this number is ().

A. non-negative numbers B. non-positive numbers C. all positive numbers D. all negative numbers

The sum of the reciprocal of 5 and -4 and the reciprocal of 4 is ()

a . 4 b . 4 c . 3d . 3

6. If A is a rational number, then │ A │-A must be ().

A. positive number B. negative number C. zero D. non-negative number

7. If ab=0, then there must be ().

A.a=b=0

At least one of C.A. and B is 0 D.a At most, one of C.A. and B is 0.

8, for any rational number a, the following statement must be correct is ()

A.a2=(-a)2，B.a3=(-a)3，C.-a2=│a│2，D│a│3=a3

9. Equation 43+43+43+43 can be changed to ()

A.4 12b.44c.48 1d。 There is no correct answer.

10, calculate (-1) 2005 × (-0.6) 2006 = ()

A.0.6 B.-0.6 C. 1 D.- 1

Three. Calculation questions: (5 points for each question, ***20 points)

①- 10+8÷(-2)3-(-2)2×(-3) ②-25 ×

○3- 14+( 1- ) ×( -2)×[4-(-2)3]

○42006-2006×3. 14 159+2. 14×2006+(- 1.00 159)×(-2006)

4. Solve problems (6 points for each question, *** 12 points)

(1)a and B are reciprocal, and X and Y are reciprocal.

And │m│= 1, and

Preferential conditions: shopping does not exceed 200 yuan, shopping does not exceed 200 yuan, shopping does not exceed 500 yuan and shopping does not exceed 500 yuan.

Preferential method: No discount, 10% off the price, including 10% off in 500 yuan and 20% off over 500 yuan.

(2) A=a+a2+a3+…+a2006 is known.

① When a= 1, find the value of a. 。

② When a=- 1, find the value of a. 。

Verb (abbreviation of verb) (8 points) Understanding and calculation:

Example: if X ※ y = 3x-2y+ 1, find the value of 5 ※ (- 1). Solution: from X ※ y = 3x-2y+ 1, we get 5 ※ (- 1) = 3× 5-2×.

6. (10) The corresponding points of known rational numbers A, B and C on the number axis are shown in the figure.

Industrial and Commercial Bank of China

Simplified: │ A-B │+│ B-C │-C-A │+│ B+C │.

7.(3+3+4 points) A store plays promotional advertisements, as shown in the following table. In order to give customers a discount, someone paid 168 yuan and 423 yuan respectively for two purchases in this mall.

(1) Down payment 168 yuan, how many goods can I buy?

(2) How much can I buy for the second payment of 423 yuan?

(3) How much does it cost to buy two goods together?

Junior high school seventh grade mathematics chapter 1 rational number test questions reference answer.

Class name _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Reference answer:

I. Fill in the blanks (10, ***30 points)

1, 2 2, -33, b, A 4,-1 and 5 5, 10.3.

6、① 1 ② 1.5 ③-9 7、3 8、 1.0× 106 9、 1000.65

10、3、7、n

Second, multiple-choice questions (10 questions, ***30 points)

The title is 1 23455 6789 10.