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Subtracting Signed Numbers
21–30 Find the difference between the signed numbers.
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Multiplying and Dividing Signed Numbers
31–50 Find the products and quotients involving signed numbers.
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33. −5(6) =
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Chapter 2
Recognizing Algebraic Properties and Notation
The properties used in mathematics were established hundreds of years ago. Mathematicians around the world wanted to be able to communicate with one another; more specifically, they wanted to get the same answers when working on the same questions. To help with that, they developed and adopted rules such as the commutative property of addition and multiplication, the associative property of addition and multiplication, and the distributive property.
The Problems You’ll Work On
To strengthen your skills with algebraic properties and notation, you’ll practice doing the following in this chapter:
Using the distributive property of multiplication over addition and subtraction
Paying attention to the order of operations
Simplifying radicals and radical expressions
Reassociating terms for easier computation
Regrouping and commuting for ease and accuracy
What to Watch Out For
Here are a few things to keep in mind while you work in this chapter:
Distributing a negative number over several terms and being sure to apply the negative sign to each term
Recognizing the fraction line as a grouping symbol
Performing the absolute value operation when it’s used as a grouping symbol
Applying the correct exponent when multiplying or dividing variables
Applying Traditional Grouping Symbols
51–58 Simplify the expressions.
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