Pre-Algebra Demystified

EXAMPLE

Find the value of
(þ41).

SOLUTION
The opposite of 41 is
41. Hence,
ð 41 Þ¼
41.

EXAMPLE
Find the value of
ð
17 Þ.

SOLUTION
The opposite of
17 isþ17 or 17. Hence,
ð
17 Þ¼17.

PRACTICE

1. Find the opposite of
   16.


2. Find the opposite of 32.


3. Find |
   23|.


4. Find |11|.


5. Find the opposite of 0.


6. Find |0|.


7. Find the value of
   (
   10).


8. Find the value of
   (þ25).


9. Find
   (0)


10. Find the value of
    j
    6 j(Be careful.)

ANSWERS

1. 16


2. 
   32


3. 23


4. 11


5. 0


6. 0


7. 10


8. 
   25


9. 0


10. 
    j
    6 j¼
    ðþ 6 Þ¼
    6

Order

When comparing numbers, the symbol > means ‘‘greater than.’’ For
example, 12 > 3 is read ‘‘twelve is greater than three.’’ The symbol <
means ‘‘less than.’’ For example, 4 < 10 is read ‘‘four is less than ten.’’

CHAPTER 2 Integers 19