1, the cube of a number equals itself, and this number is ().
Answer, 0
b、 1
c 、- 1， 1
d 、- 1， 1，0
2, in the following categories, is not equal to ()
A, (-3)2 and -32
B, (-3)2 and 32
C, (-2)3 and -23
D, |-2|3 and |-23|
3、(- 1)200+(- 1)20 1=( )
Answer, 0
b、 1
c、2
d 、-2
4. There is a set of numbers:-1, 1/2,-1/3, 1/4,-1/5, 1/6, and the seventh number is ().
a 、- 1/7
b、 1/7
C, VII
d、7
5, the following statement is correct ()
A. The absolute value of rational number must be positive.
B, if the absolute values of two numbers are equal, then the two numbers are equal.
C, if a number is negative, then the absolute value of this number is its reciprocal.
D, the greater the absolute value, the greater the number.
6. Comparing the sizes of-1/5 and-1/6, the result is ().
A, b, c, = D, uncertain
7, the following statement is wrong ()
Zero divided by any number is zero.
The absolute value of the reciprocal of b and -7/9 is 9/7.
C, the opposite number is equal to its own number is zero and all positive.
Dividing by a number is equal to multiplying by its reciprocal.
8, (-m) 10 10, there must be ().
A, m0 B, m0 C, m=0 D, all of the above are wrong.
9. Compared with its reciprocal 1/n, the reciprocal of a positive integer n is -n, and the correct one is ().
a 、-n≦n≦ 1/n
b 、-n 1/n
c、 1/n
Math test 2 1 for the first grade of junior high school. Fill in the blanks.
(1) Five people get 30 apples on average, and each person gets _ _ _ _ _; M people get n apples on average, and everyone gets _ _ _ _.
(2) Work one hour a day and _ _ _ _ hours five days.
(3) The car travels 40 kilometers per hour, so it travels _ _ _ _ kilometers within 2 hours; Walk _ _ _ _ kilometers in t hours; If a car travels at a speed of V kilometers per hour, it travels at a speed of _ _ _ kilometers per hour.
(4) The area of a rectangle is 40 square centimeters. If its width is 5 centimeters, its length is _ _ _ centimeters. If its length is m centimeters, its width is _ _ _ centimeters.
(5) The radius is r and the circumference is equal to _ _ _ _ _; The area of a circle is equal to _ _ _ _.
(6) The base of a triangle is A, the height is H and the area is _ _ _ _.
2. Multiple choice problem
(1) The following statement is true ()
(A)a stands for positive number (B)-a stands for negative number.
(c) indicates that the score in (d) above is incorrect.
(2) The sum of squares of A and B is ()
(A)2(B)a2+B2(C)a2+B(D)A+B2
(3) The correct expression of "reciprocal of the difference between A and B" is ()
(A)-a-b(B)-(a-b)(C)a-b(D) are all incorrect.
(4) "-| x |" is described in the language as ()
(a) the reciprocal of x (b) the absolute value of x.
(c) the reciprocal of the absolute value of x (d) the reciprocal of the absolute value of x.
3. True or false
(1)-3a must be a negative number. ()
(2) is the reciprocal of X.
(3)(x-y) and (y-x) are antonyms. ()