1. Fill in the blanks (except the first question, 65438+ 0 point for each question)
1. Fill the following figures in the corresponding brackets.
8, ,0.275,0, , , ,
Positive integer set
Integer set
Negative integer set
Positive fraction set
2. If the meter to the south is meters, then the meter to the north is _ _ _ _ _ _ _ _ _, and 0 meters means _ _ _ _ _ _ _ _ _ _ _ _ _ _;
3. The point on the number axis with a unit distance from the origin is _ _ _ _ _ _ _ _ _ _ _ _;
4. Given a point on the number axis, move the point to the left by one unit and then to the right by one unit length, then the number represented by the point is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _;
5. The reciprocal of is _ _ _ _ _ _, the reciprocal is _ _ _ _, and the absolute value is? ______;
6. The number that is neither positive nor negative is _ _ _ _ _ _ _, and its reciprocal is _ _ _ _ _ _ _;
7. The largest negative integer is _ _ _ _ _ _ _, and the smallest positive integer is _ _ _ _ _ _ _;
8. The cardinality in is and the index is;
9.+ = ;
10, once Xiao Ming drew four cards while playing some games, namely,, and he was very confused. I believe that you who are clever can help him. Please write a successful formula: _ _ _ _ _ _ =;
1 1, known, then = _ _ _ _ _ _.
2. Multiple choice questions (***20 points)
1. In,,, the number of negative numbers is ().
A.B. C. D。
2. A number plus equals, then this number is ().
A.B. C. D。
The reciprocal of 3 is ()
A.B. C. D。
4. Comparing the sizes of,, and, the following statement is true ()
A.& gt& gt& gtb . >； & gt& gt
C.& gt& gt& gtd . >； & gt& gt
5. The product of two numbers is called reciprocal negative, so reciprocal negative is ().
A.B. C. D。
6. The difference between the reciprocal of a rational number and its own absolute value is () in the following cases.
A. it may be positive. B.it must be negative. C. must be negative. D. must be 0.
7. It is ()
A. or B.C.D or
8. The following statement is true ()
A.B. C. D。
9. The absolute value of a number is, then this number can be ().
ABC or d
10. Equal to ()
A.B. C. D。
3. Observe the following formulas:,,,, Please fill in the blanks with the rules obtained after observation: (3 points for this question)
Four, calculation (writing process, ***47 points)
1、 + + + 2、 +
3、 4、
5、 6、8+
7、 8、
9、 10、
1 1、 12、
Verb (abbreviation of verb) =, =, ask (4 points for this question)
6. The warning water level of Liuhua River is 100 meters. The following table records the water level changes in a certain week this year. Taking the warning water level of the river as the point, the water level reached the warning water level last weekend (Saturday). A plus sign indicates that the water level is higher than the previous day, and a minus sign indicates that the water level is lower than the previous day. (6 points for this question)
week
sun
one
two
three
four
five
six
Water level change (m)
(1) When is the highest water level of the river this week? On which day is the lowest water level in the river? Are they above or below the warning water level?
Compared with last weekend, did the river water level rise or fall this weekend?
(3) Taking the warning water level as zero point, the water level of this week is represented by a broken line statistical chart;
Water level change (m)
Week 123456