The absolute value of 1 is, the reciprocal of is, and the reciprocal of is.

2. The water level of a reservoir drops 1m, recorded as-1m, and then+1m.. 2 meters means.

3. Rational number -3 is represented on the number axis. Five and four. The distance between two points is.

4. If | a-3 |+= 0 is known, then =.

5. It is known that p is a point on the number axis. If point P is moved to the left by one unit and then to the right by one unit length, then the number represented by point P is _ _ _ _ _ _ _ _ _ _.

6. The sum of the largest negative integer and the smallest positive integer is _ _ _.

7、 + = 。

8. If X and Y are two negative numbers, X

9. If |a|+a=0, the value range of a is

10, if a2= 16, then a=, if A3 =-27, then a =;

Second, choose one carefully: (3 points for each small question, ***24 points. Please fill in your choice answer in brackets. )

1. If the sum of the squares of a number is equal to 0, then the number can only be ().

A0b- 1c 1d0 or 1

2. The absolute value is greater than or equal to 1, and the sum of all positive integers less than 4 is ().

A 8 B 7 C 6 D 5

3. Calculation: (-2)100+(-2)10/Yes () A 2100b-1c-2D-2100.

4. The sum of two negative numbers must be () A negative B non-positive C non-negative D positive.

5. It is known that two points representing -2 and-10 1 on the number axis are A and B respectively, so the distance between these two points is equal to () a99b100c102d65438.

6. If, then the size relationship of A, a2, and is ()

A, B, C, D,

7. if x>0, y<0, and | x | < |y|, then x+y must be ().

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

8, the absolute value of a number is, then this number can be ().

A B C or d

9, equal to () A B C D

10, is it () A or B C D or

Third, the calculation problem (4 points for each small question, 32 points for * * *)

1、 + + + 2、 +

3、 4、

5、 6、8+

7、 8、 100

(5 points) =, =, find the value of m+n.

5.(5 points) It is known that they are reciprocal numbers and reciprocal numbers (that is, the smallest positive integer). Trial value

6.(6 points) Taxi driver Xiao Li's operation in the afternoon was all on the East-West Renmin Avenue. If it is stipulated that east is due west and negative, his mileage this afternoon (unit: km) is as follows:

+ 15,—2,+5,— 1,+ 10,—3,—2,+ 12,+4,—5,+6

(1) How far was Xiao Li from the starting point when the last passenger arrived at the destination?

(2) If the fuel consumption of the car is 3 liters/km, how many liters will Xiao Li * * * consume this afternoon?

Seven. The positions of known numbers M and N on the number axis are as follows: (95 points)

Simplify:

Eight, (6 points) observe the following:

… … …

1. Calculate the value of:

Welcome everyone to read the second unit of mathematics in the first semester of senior one. Be sure to savor it. Let's go