How many numbers have an absolute value of 5?

This is a junior high school mathematics problem, we just learned, the absolute value is 5, there are two, one is 5, one is - 5, absolutely accurate! Our math teacher corrected it,

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1. [urgent] how many numbers are there whose absolute value is - 5? How many numbers have an absolute value of - 5? For Formula 2 - | x, when x is equal to what value, there is a maximum value? What is the maximum value? For the formula | x | + 13, when x is equal to what value, there is a maximum value? What is the maximum value? The third question is wrong: for the formula | x | + 13, when x is equal to what value, there is a minimum value? What is the minimum value?
2. 18. The absolute value of number 5 is 5, which is itself; the absolute value of number – 5 is 5, which is its opposite number; the above comes from the theorem that the absolute value of non negative number equals itself, and the absolute value of non positive number equals its opposite number__________ The absolute value of negative number - B is________ The absolute value of negative number 1 + A is________ The absolute value of a + 1___________ . 19. It is known that | a | = 3, | B | = 5, and a
3. What are the absolute values of - 5, - 18, 3 and 0
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5. Write the absolute values of the following numbers: 5 - 7 0 - 3.5 Write the absolute values of the following numbers: 5 - 70 - 3.5 minus two seventh, + 10000
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12. Given that two numbers are 3 and - 5, the absolute value of the sum of these two numbers is______ The sum of the absolute values of these two numbers is______ The sum of the opposite numbers of these two numbers is______ The opposite of the sum of these two numbers is______ ．
13. What is the relationship between the absolute values of two opposite numbers?
14. If two numbers 7 and - 15 are known, what is the absolute value of these two numbers? What is the sum of the absolute values of these two numbers?
15. If the sum of the absolute values of two numbers is known to be 0, then the two numbers are zero
16. If the absolute values of two numbers are equal, then two numbers are equal;
17. -The product of the reciprocal of 2 / 7 and the number whose absolute value is 2 / 21 is () A. 1 / 3 B. - 1 / 3 C. 1 out of 3 d. 4 out of 147
18. It is known that a and B are opposite to each other, C and D are reciprocal to each other, and the absolute value of X is 5. Try to find the value of 2x - (a + B + CD) x1998 + (- CD) 1999 There is no multiplication sign in the formula, it's X!
19. Given that a and B are opposite numbers, C and D are reciprocal, the absolute value of X is 8, find CD + A + B - | X|
20. -What is the result of the opposite number of the absolute value of 7 plus the opposite number of - 3 (☆_ ☆)（＾_ ＾）*\(^o^)/*