Beginning Algebra
Answer/Discussion to Practice
Problems
on Symbols and Sets of Numbers
 Answer/Discussion
to 1a
5 ? 0
Since 5 is to the right of 0 on the number line, then 5 > 0.
(return to problem
1a) |
| Answer/Discussion
to 1b
First of all,  .
Next we have  .
Since both absolute values equal the same number ½, then  .
(return to problem
1b) |
| Answer/Discussion
to 1c
-2 ? 2
Since -2 is to the left of 2 on the number line, then -2 < 2.
(return to problem
1c) |
| Answer/Discussion
to 2a
-3 < -3
Since -3 is the same number as -3 and the statement includes where
the two numbers are equal to each other, then this statement is true.
(return to problem
2a) |
| Answer/Discussion
to 2b
2 > 4
Since 2 is to the left of 4 on the number line, then 2 <
4.
So, the above statement is false.
(return to problem
2b) |
| Answer/Discussion
to 3a
-4 is less than 0.
Reading it left to right we get:
-4 is less than 0
-4 < 0
(return to problem
3a) |
| Answer/Discussion
to 3b
3 is not equal to -3.
Reading it left to right we get:
3 is not equal to -3
(return to problem
3b) |
| Answer/Discussion
to 3c
5 is greater than or equal to -5.
Reading it left to right we get:
5 is greater than or equal to -5.
5 > -5
(return to problem
3c) |
| Answer/Discussion
to 4a
Natural numbers
The numbers in the given set that are also natural numbers are
{2,  }.
Note that
simplifies to be 3 which is a natural number.
(return to
problem 4a) |
All contents copyright (C) 2001 - 2008, WTAMU and Kim Seward. All rights reserved.
Last revised on Jan. 8, 2002 by Kim Seward. |
}.