Current location - Training Enrollment Network - Mathematics courses - The answer is attached to the first volume of the first grade math test paper. Thank you for your urgent need.
The answer is attached to the first volume of the first grade math test paper. Thank you for your urgent need.
Ability training

First, multiple-choice questions.

1. The following statement is true ()

① Rational number can be an integer or a fraction ② Rational number can be a positive number or a negative number.

Integer can be positive or negative. The score can be positive or negative.

A 1 B 2 C 3 D 4

2. The following statement is true ()

①0 is a rational number with the smallest absolute value ② The number whose reciprocal is greater than itself is a negative number.

③ The numbers on both sides of the origin on the number axis are opposite; ④ Compared with the two numbers, the absolute value is larger but smaller.

A ①② B ①③ C ①②③ D ①②③④

3. The following operation is correct ()

a-5/7+2/7 =-(5/7+2/7)=- 1 B-7-2×5 =-9×5 =-45

C3÷5/4×4/5 = 3/ 1 = 3d-(-3)2 =-9

4. If A+B < 0 and AB < 0, then ()

A a>0,b>0 B a