Current location - Training Enrollment Network - Mathematics courses - People's Education Edition Eighth Edition Mathematics Examination Paper
People's Education Edition Eighth Edition Mathematics Examination Paper
Eighth grade first volume "real number" unit examination questions

1. Multiple choice questions (3 points for each question, * * * 24 points)

The value of 1. Equal to ()

The third century BC.

2. In the number-1.4 14, π, 3. , 2+, 3.2 122 1 …, 3. 14, the number of irrational numbers is ().

A.5 B.2 C.3 D.4

3. The following conclusions are known: ① Only irrational numbers can be represented on the number axis; ② Any irrational number can be represented by a point on the number axis; ③ Real numbers correspond to points on the number axis one by one; ④ Rational numbers are infinite and irrational numbers are limited. The correct conclusion is ().

A.①② B.②③ C.③④ D.②③④

4. The following calculation is correct ()

a、B、C、D、

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

The arithmetic square root of A 3 is the square root of B 3 is.

C-3 is the arithmetic square root of D. -3 is the cube root of D.

6. If both A and B are real numbers and satisfy │ A-2 │+= 0, then the value of B-A is

A. 2b. 0c-2d. None of the above is true.

7. If it is -3, the value range of is ().

A.> 3 B. ≥3 C.