Ratios Math

What is the ratio of four sided shapes to green shapes?

• 8:4

• 4:1

• 8:2

• 2:1

Answer explanation

Items can be included in both parts of a ratio. So some shapes are both green and four sided and get included in both counts.

Also: lowest terms!

A jar is filled with pennies and nickels in the ratio of 5 : 3. There are 30 nickels in the jar, how many coins are there?

• 5

• 8

• 80

• 50

Convert the following to a unit ratio --> 22:13

• .69:1

• 2

• 0.59:1

• 2:1

Answer explanation

In a unit ratio, the second term is always 1. To convert a ratio into a unit ratio. Divide both terms by the second term... or divide the first term by the second term

Why can unit ratios be helpful? (select all that apply)

• They sometimes convey more meaningful information

• They are always whole number ratios and look nicer

• They aren't

• They make it easier to compare two different ratios

Answer explanation

Unit ratios convey more meaningful information: Saying Person A driving 320 km in 4 hours is a lot less helpful than hearing Person A driving 80 km in one hour (80 km/hr)

They also make it easier to compare two different ratios. Like above: Who's faster? Person A or Person B driving 440 km in 6 hours? By converting to a unit rate (divide first term by second term) I see person B is going 73 km/hr and is slower than Person A

Which is the best buy?

• A

• B

• C

Answer explanation

In order to compare these, they each need to be converted to a unit rate (first term divide by second term)

What is an equivalent ratio to 3/4?

• 1/4

• 4/5

• 12/16

• 14/18

What is the ratio of the hot dogs to cheeseburgers?

• 1:2

• 2:6

• 4:2

• 2:1

Which ratio is equivalent to 3:4

• 12:14

• 6:8

• 4:3

• 20:15

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

Which of the following options is a real life example of a ratio?

• 12 noodles

• 4 meatballs : 1 cup of sauce

• 1 jar of sauce

• 15 desserts