Pearson Algebra 1 Common Core, 2011
PA
Pearson Algebra 1 Common Core, 2011 View details
2. Order of Operations and Evaluating Expressions
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Exercise 24 Page 13

Pay close attention to the order of operations.

6

Practice makes perfect

According to the order of operations, expressions inside parentheses are evaluated first, while addition and subtraction are evaluated last. For the given expression, this means evaluating completely the expressions inside the numerator and the denominator before calculating the fraction. 2 * 7 + 4/9 ÷ 3Notice also that even within the numerator, we must obey the order of operations. 2 * 7 + 4 For this, we must remember to evaluate the multiplication first and the sum next.

Operation Before Simplification After Simplification
Multiply 2 * 7 + 4/9 ÷ 3 14 + 4/9 ÷ 3
Add terms 14 + 4/9 ÷ 3 18/9 ÷ 3
Calculate quotient 18/9 ÷ 3 18/3
Calculate quotient 18/3 6

The expression equals 6.

Alternative Solution

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