4. The sum of two square roots of a positive number is _ _ _ _ _. The quotient of two square roots of a positive number is _ _ _ _ _.
If |a-b+ 1| and the root sign (a+2b+4) are antonyms, then the cube root of (a-b) is ().
The absolute value of 1 -5 is _ _ _ _ _, the reciprocal of-is _ _ _ _ _ _ _, and the reciprocal is _ _ _ _ _ _ _ _.
2. use the ">" symbol to connect the following numbers in descending order: -5, -2, -3.6, -6,+1, 0, _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.
3. Use "
4. use ">" to connect -0.75 and _ _ _ _ _.
5. The smallest positive integer is _ _ _ _ _ _, and the largest positive integer is _ _ _ _ _.
6. The largest negative integer is _ _ _ _ _ _, and the smallest negative integer is _ _ _ _ _.
7. The reciprocal of is _ _ _ _ _ _ _ _, the reciprocal of is _ _ _ _ _ _ _, and the absolute value of is _ _ _ _ _ _ _.
8. Among the numbers,-3. 1 4,0.1010001... (there is a zero between two1), there are _ _.
9. If the reciprocal of a number is, then the number is _ _ _ _ _.
10. If a+b = 0, the relationship between these two numbers is _ _ _ _ _ _ _ _;
If a-b = 0, the relationship between these two numbers is _ _ _ _ _ _ _ _;
If AB = 1, the relationship between these two numbers is _ _ _ _ _.
1 1. If, then a = _ _ _ _ _ _
12. If a < 0, the result is _ _ _ _ _.
13. Point A on the number axis indicates that the number represented by a point three length units away from A is _ _ _ _ _ _.
14. If so, then a = _ _ _ _ _ _ _ and b = _ _ _ _ _.
15. When x < 0, _ _ _ _ _.
Second, judge right or wrong:
1. Rational number is a general term for integer and decimal. ()
There is no minimum real number. ()
3.A+B is a rational number, so both A and B are rational numbers. ()
4. The squares of real numbers are all positive numbers. ()
5. Even powers, absolute values and arithmetic roots of nonnegative real numbers are nonnegative. ()
6. If n is a positive integer, then 2n is even and 2n+ 1 is odd. ()
7. This is a score. ()
8.a+ 1>a ( ) 2a>a()
9. If, then X = Y. ()
10. If. ()
1 1. If, then. ()
12.a >-a applies to any real number. ()
13. If >, then >. ()
14. If so, then m =- 10. ()
Third, choose to fill in the blanks:
1. If X is displayed on the axis, the correct one in the following categories is ().
A.B.
All of the above are wrong.
2. Known, then the value of x is ().
A.x0
3. The following statement is true ().
A. if a > 0, then > b.a >, then a < 1.
C. if 0 < a < 1, then a > D, if so, then a > 0.
4. If a number is equal to 9 times its reciprocal, then this number is ().
The third century BC.
5. If it is established, then ()
A.a and b have the same number, but b.a and b have different numbers.
C.a and b are rational numbers with the same sign or ab = 0.
6. In real numbers, 0, -3. 14, and irrational numbers have ().
1。
7. In the following categories, the smallest number is ().
A. real number B. natural number C. integer D. rational number
8. If m represents a real number, -m represents a ().
A. negative number B. positive number C. real number D. non-positive number
Fourth, calculation:
1.； 2.； 3.；
4.(- 1)? (0.3)? (-3); 5.；
6.； 7.0-
8. Calculate by simple method;
9.； 10.；
1 1.； 12.；
13.；
14.；
15.；
16.；
17.；
18.(n is an integer);
19.；
20.。
Reference answer
I. 1 > 0 >-3.6 >-5 >-6.3 3.
4.>-0.75 5. 1, No.6. -1, No.7.
8.0.10100100100019.10. They are antagonistic, equal and mutually beneficial.
1 1.―4,―2 12.―2a 13。 ， 14.a=2，b=8 15.2
Two. 1 .× 2.√ 3 .× 4 .× 5.√ 6.√ 7 .× 8.√× 9.× 10.× 1 1.√
12.× 13.× 14.×
Three. 1.c2.c3.c4.c5.d6.a7.b8.c
Four. 1.02.27 3.4.0.95.- 1 6. 1.057.-9 8.09. 10.0
1 1.- 1 12.-22 13. 192 14.- 12 15. 16. 17.-489
18.4 19.6 20