5.1: Ratios & Rates

5.1: Ratios & Rates

Wednesday 1/20/21

First, we will look at ratios, which compare quantities (or amounts) that have the same (or at least similar) units.

Now, you will get to try two examples on your own!

When you are ready to proceed, click the arrow to go to the next slide. If you have any questions about what you saw, I am available in the Zoom chat to answer any questions!

Fill in the Blanks

Write the ratio as a fraction in simplest form.

45 to 72

Samples of Answers (type a space after each character):

2 : 1

2 to 1

2 / 1

Fill in the Blanks

Write the ratio as a fraction in simplest form.

18 girls : 15 boys

Samples of Answers (type a space after each character):

2 : 1

2 to 1

2 / 1

Next, we will look at rates and unit rates. The difference between ratios and rates is that rates compare quantities whose units are not the same (like money and time).

Now, you will get to try two examples on your own!

When you are ready to proceed, click the arrow to go to the next slide. If you have any questions about what you saw, I am available in the Zoom chat to answer any questions!

Fill in the Blanks

Find the unit rate:

$11.88 for 12 songs

Type your answer as "$ per song"

Sample: $2.25 per song

Fill in the Blanks

Find the unit rate:

297 words in 5.5 minutes

Type your answer as "words per minute"

Sample: 2 words per minute

Finally, we will look at how ratios and rates can be used to solve problems.

Now, you will get to try two examples on your own!

When you are ready to proceed, click the arrow to go to the next slide. If you have any questions about what you saw, I am available in the Zoom chat to answer any questions!

Fill in the Blanks

A painter can paint 350 square feet in 1.25 hours. How much can be painted in 4 hours?

Write your answer as "square feet"

Sample: 2 square feet

Fill in the Blanks

An oil spill spreads 25 square meters every  $\frac{1}{6}$  hour.  How much area does the oil spill cover after 2 hours?

Write your answer as "square meters"
Sample: 2 square meters