Introduction to Ratios

What is a Ratio?

• Is a comparison of two quantities 
• A rate with a denominator of one
• It is when the only factor the numerator and denominator share is a one 
• Two decimals that can be multiplied

Equivalent means....

• very important
• one
• equal to
• to solve

A ratio can be written as all the ways below EXCEPT which one?

• 3=4
• 3:4
• 3/4
• 3 to 4

What is the ratio of triangles to squares?

• 2:6
• 5:6
• 3:4
• 4:3

Patrick has 2 black, 3 red, and 5   white toy cars. What is the ratio of red toy cars to all the toy cars? 

• 3:5
• 1:3
• 3:11
• 3:10

Kelly has 10 apps on her iPad. 5 are school apps, 2 are music apps, and 3 are games. What is the ratio of school apps to game apps?

• 5 to 2
• 3 to 5
• 5 to 10
• 5 to 3

Is the following ratio part-to-part or part-to-whole?

5 out of 23 kids in a class play the trumpet.

• part-to-whole

• part-to-part

Ten soccer players were going to a soccer tournament with their three coaches. What is the ratio of coaches to players?

• 10:3

• 10:13

• 3:10

• 3:13

A ratio can be written as all the ways below EXCEPT which one?

• 3=4

• 3:4

• 3/4

• 3 to 4

The ratio of triangles to circles is 3:2

• True

• False