Ratios and Bar Models

What is a comparison of two quantities that can be written in three ways?

Example (A to B, A:B, A/B)

• Rate

• Percent

• Ratio

• Fraction

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

If there are 5 boys and 7 girls, write the ratio of girls to boys.

• 5 to 7

• 7 to 5

• 5 to 12

• 7 to 12

Mrs. Shelly paid $3 for 6 muffins and Mrs. Kloske paid $9 for 18 muffins.  

• yes, equivalent

• no, not equivalent

Which ratio is equivalent to 5 to 4

• 25 to 20

• 10 to 12

• 4 to 5

• 15 to 8

What is a ratio?

• A number over another number

• Multiplying two fractions

• Two decimals that are multiplied

• A comparison of two numbers

In the fruit bowl there are 4 apples, 2 bananas, and 5 pears.  What is the ratio of pears to ALL fruit?

• 5:4

• 5:11

• 2:5

• 6:5

Kevin is mixing paint to make orange. The ratio of red paint to yellow paint is 3 oz to 5 oz. How much yellow paint should he mix with 9 oz of red paint?

• 15 oz

• 30 oz

• 45 oz

• 11 oz

What are three ways to write a ratio for the amount of dogs compared to the number of cats.

• 7:11

• 11:7

• 11 to 7

• 11/7

• 12 to 7

What is the ratio of red apples to green apples

• 7 apples to 3 green

• 4 red apples to 7 apples

• 4 red apples to 3 green apples

• 3 green apples to 4 red apples