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Envision Math 2.0: Grade 6, Volume 1 View details

Review

Exercise 1 Page 169

Remember the order of operations.

Practice makes perfect

To evaluate the given numeric expression, we need to remember the order of operations. The acronym PEMDAS can help with that!

First we simplify calculations that are in parentheses. Second, we calculate exponents and roots. Then, we simplify multiplication and division, which are solved on the same level of importance and from left to right. Finally, we calculate addition and subtraction, which are also on the same level of importance, from left to right. Let's now consider our expression.

80 - 4^2 ÷ 8 We first need to calculate the exponent expression. 80-4^2÷ 8 calculate power ⟶ 80-16÷ 8 Next, we can calculate the quotient. 80-16÷ 8 divide ⟶ 80-2 Now we can finish evaluating our expression by subtracting 2 from 80. 80-2 subtract ⟶ 78

Subchapter links

Topic Essential Question p.167

Vocabulary Review p.167

Use Vocabulary in Writing p.167

1 Understand and Represent Exponents p.168

2 Find Greatest Common Factor and Least Common Multiple p.168

3 Write and Evaluate Numerical Expressions p.169

4-5 Write and Evaluate Algebraic Expressions p.169

6 Generate Equivalent Expressions p.170

7 Simplify Algebraic Expressions p.170

Exercise 1 Page 169

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