The reciprocal of 1 and-is _ _ _ _, and the reciprocal is _ _ _ _ _.
2. In the number 0. 2,-,0, -|-5 |, -0.5, the score is _ _ _ _ _ _ _, and the integer is.
3. The base of Equation -62 is, the exponent is, and the calculation result is.
4. Multiply any three numbers by -5, 1, -3, 5 and -2, where the largest product is and the smallest product is.
5. Write 365000= with scientific notation.
6. The reciprocal of is _ _ _ _ _ _, and the reciprocal is _ _ _ _ _ _.
7. Calculation: ①-4-5 = ② =
③ 0÷(-4)= ④ + =
8. The rational number with absolute value equal to 9 is, and the rational number with square equal to 9 is.
9. Comparison size: —32 (—3)2
10 enclose the following formula:
①(a+b)+(c-d)=②(a-b)-(c-d)= 1
1 1, given that | x+2 |+(y-3) 2 = 0, then x =；; y=_______。
12, known, is opposite, then.
Second, multiple-choice questions: (2 points for each question, ***20 points)
1. On the number axis, the origin and the point to the right of the origin represent the number ().
Positive number b negative number
C is not positive and d is not negative.
2, in the following figures, the equivalent value is ().
A. and B. and ...
3, the following statement is correct ()
A.3500 is expressed by scientific notation as 35× 102 B.- 1473 is expressed by scientific notation as-1.4× 1000.
C. The divisor 2.395 is accurate to one hundredth of 2.40d, and the significant figures of the divisor 3.50 are 3 and 5.
4. if A+B > 0 and AB > 0, then ()
A.a>0，b>0
C.a > 0, b < 0 and | a | >| b | d.a > 0, b > 0, and | a | < | b |
5, (-2) is ()
A.–2 b .(-2)c . 0d .-2
6. The operation of specifying positive rational numbers A and B is as follows: a★b=, then the value of 8★6 is ().
14 c .–24d . 24
7, known,, and, the value is equal to ()
(A) 10 and-10 (b)10 (c)-10 (d) are all incorrect.
8. The following statement is correct: .............................. ()
A. A square is its own number, with only 0.
B.the reciprocal is its own number.
C. the absolute value is its own number is positive,
D. A cube is its own number.
9, known,,, then the following correct figure is ().
(A) (B) (C) (D)
10, if | a | > 0, then ()
A.a cannot be equal to zero. B.a must be a positive number. C.a must be a negative number. D.a is an arbitrary rational number.
3. Draw a number axis, and express it on the number axis: 3.5 and its inverse, the number whose absolute value is equal to 3, the largest negative integer and its square, and use "
Four. Calculation: (5 points for each question, ***30 points)
① (-5)+(+8)+( )-(- 1 1)-2 ②
③ ④
⑤ ⑥
5. Given A =-2, B = 3 and C =-0.5, find the value of algebraic expression a=-2+3B-4C. (5 points)
6. It is known that A and B are reciprocal, C and D are reciprocal, the absolute value of M is equal to 2, and P is the number whose distance from the axis to the origin is 1. Find the value of p2004-cd+ +m2. (5 points)
7. Observe the following equations,,, Please fill in the blanks with the rules you get after observation: (3 points)
8. Xiao Wang bought a certain share 1 1,000 shares last week, each 27 yuan. The following table shows the daily ups and downs of the stock this week: (unit: yuan) (7 points)
Sidereal period 12345
Up and down per share+1+1.5-1.5-2.5+0.5.
(1) What was the share price at the close on Wednesday?
What's the highest price per share this week? What is the lowest price per share?
Do you think Xiao Wang will make a profit if he sells all his stocks at Friday's closing price?