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Big Ideas Math: Modeling Real Life, Grade 6

BI

Big Ideas Math: Modeling Real Life, Grade 6 View details

Chapter Review

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Exercise 10 Page 35

Pay close attention to the order of operations.

16

Practice makes perfect

According to the order of operations, expressions inside parentheses are evaluated first, followed by exponents, then multiplication and division, and finally addition and subtraction are evaluated last. We can use the acronym PEMDAS to help us remember the correct order!

pemdas

For the given expression, this means that we need to start by multiplication and division before subtraction. 3* 6 -12 ÷ 6 Let's do it!

Operation	Before Simplification	After Simplification
Multiply and divide	3* 6- 12÷ 6	18- 2
Subtract terms	18- 2	16

The expression is equal to 16.

Alternative Solution

Using a Calculator

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

Subchapter links

1 Powers and Exponents p.35

2 Order of Operations p.35

3 Prime Factorization p.36

4 Greatest Common Factor p.36

5 Least Common Multiple p.37