body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

Big Ideas Math: Modeling Real Life, Grade 6

BI

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

Cumulative Practice

Exercise 1 Page 101

Pay close attention to the order of operations.

B

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 evaluate the exponent first. 6* 8 - 2* 3^2 Let's do it!

Operation	Before Simplification	After Simplification
Calculate power	6* 8 - 2* 3^2	6* 8 - 2* 9
Multiply	6* 8 - 2* 9	48 - 18
Subtract terms	48 - 18	30

The expression is equal to 30. This corresponds wit the option B.

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

Exercises