Level 3A - Expressions Word Problems

Level 3A - Expressions Word Problems

Let's Review!

Before we continue with today's lesson, let's review how to simplify expressions. On the following slides, select the answer that correctly shows how each expression should be simplified.

Multiple Choice

Simplify: (6v - 6) - (-8v + 3)

• 14v - 3

• -2v - 3

• 2v + 9

• 14v - 9

Multiple Choice

Simplify: (2n - 9) - 5(-2.4n + 4)

• 14n - 29

• 10n + 29

• 10n +11

• 14n -11

Multiple Choice

Simplify: -7(-4b - 9) + 9(3b + 3)

• b + 63

• 55b + 66

• 55b + 90

• b + 66

Writing and Solving Word Problems

On the next few slides, you will be writing some expressions to match some scenarios. Then you will be simplifying those expressions

Poll

You EARN (4x + 2) points after completing x levels of a video game and then LOSE (2x - 5) points for losing a life. Which expression represents the total number of points you have now?

• (4x + 2) + (2x - 5)

• (4x + 2) - (2x - 5)

• (2x - 5) - (4x + 2)

• (2x - 5) + (4x + 2)

Multiple Choice

Now that you know the expression should be (4x + 12 ) - (2x - 5), how would you simplify this expression?

• 2x + 7

• 6x - 17

• 2x + 17

• 6x + 7

Poll

In this diagram, the length and width are labeled. Which of the following options could be a way to calculate the perimeter of the rectangle?

• 2(2 + w + w)

• 2(2 + w) + 2(w)

• 4(2 + 2w)

• (2 + w) + w

Multiple Choice

Using one of the correct expressions from the previous slide, what would the simplified version of the perimeter of this rectangle? 

• 4w

• 4w + 4

• 2w + 2

• 2w + 4

Multiple Choice

The expression 17n + 11 represents the perimeter of this triangle. Two of the sides of the triangle are labeled. Use these expressions to find the side length of the third side.

• 8n

• 6n + 22

• 8n - 22

• 26n + 22

Multiple Choice

You start a new job. After {w} weeks you have (10w + 120) dollars in your savings account and (45w + 25) dollars in your checking account. Write a simplified expression that represents the total amount of money you have in both accounts.

• 55w + 95

• 35w + 95

• 55w + 145

Multiple Choice

While catching fireflies, you and a friend decide to have a competition. After {m} minutes, you have (3m + 13) fireflies and your friend has (4m + 6) fireflies. Write a simplified expression to show how many fireflies you and your friend have caught together.

• m + 7

• 7m + 19

• 26m

• 12m + 19

Multiple Choice

If you have (3m + 13) fireflies and your friend has (4m + 6) fireflies, who would have more fireflies after 5 minutes {m}?

• you

• your friend