Pearson Algebra 1 Common Core, 2011
PA
Pearson Algebra 1 Common Core, 2011 View details
3. Real Numbers and the Number Line
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Exercise 83 Page 22

Pay close attention to the order of operations.

72

Practice makes perfect
According to the order of operations, expressions inside of the parentheses are calculated first and multiplication is evaluated last.
Operation Before Simplification After Simplification
Add terms ( 7 + 1)9 ( 8)9
Multiply ( 8) 9 72
The expression equals 72.

Alternative Solution

Using a Calculator

We can also evaluate this expression using a calculator. To do so, type it as shown below.