Writing and Evaluating Numerical Expressions

Lesson 3-3 Write and Evaluate Numerical Expressions

Warm-Up

How would you write 4x4x4 with an exponent?

When I say "waterfall", we will put our answers in the chat.

Today's Objective:

We will evaluate expressions using the order of operations and insert grouping symbols in a numerical expression to affect the value of the expression.

Solve & Discuss It: Think Abouts While Working

• What are you asked to do? What information will you use?

• What do you need to do to find the total amount of fees charged for overweight and oversized bags?

• How could you write an expression to find the total fee for all of the bags?

Example 1: Follow Along With The Video

• If there were no parentheses inside the brackets, would the value of this expression change?

• What keys on a calculator can be used to evaluate powers?

• In the calculator steps, why is the product 16 divided by 2?

Try It!

Evaluate the numerical expression at the right.

What operation should you do first?

What operation is indicated when there is no operation symbol between a number and the first parenthesis?

Example 2 - Page 133

Take a look at the numerical expression. What operation should we do first?

Let's work through together!

Example 2

How did we do?

Poll

How are we feeling about the lesson so far?

• I totally get it!

• Kinda!

• Not even close!

Example 3 - Follow Along With The Video!

• Why doesn't putting parentheses around (40-7) change the value of the expression?

• Why does putting parentheses around 7+33 change the value of the expression?

Try It!

Evaluate the numerical expression.

Which operation will you do first?

Evaluate the Expression

Multiple Select

Which answer did you get?

• 18.6

• 28.6

• 42

• None of these

Complete the following questions independently:

Page 134 #'s 6-9

Open Ended

Evaluate and submit your answer:

12 x (3²+36)

Poll

Tomorrow we will practice more, but how are you feeling now?

• I have it mastered!

• I have it down a little!

• I'm still lost!