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Elementary Algebra Written Homework
Chapter 1
The Commutative Property [1.2]
1. Is subtraction commutative? Give an example to illustrate your answer.
Addition and subtraction of fractions [1.3 - 1.6]
In MyMathLab, getting the correct answer in simplified form is sufficient, because a machine cannot look at
your work and verify that you did the process by hand. However, knowing how to use a calculator is not
sufficient for test-taking. Make sure you are able to do the process by hand, showing all of the relevant steps
as you go.
2. Add.
7 5
+
8 12
3. Subtract.
2 " 1%
! !$! '
3 # 6&
Sets of numbers [1.4]
4. Give an example of a rational number that is not an integer.
5. Give an example of a real number that is not a rational number.
Signs with exponents [1.8]
6. Evaluate
a. !52
b.
( !5)2
7. In your own words, explain how you know for certain that you got the right sign for your answer on each of
the above.
Ch 1
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