ratios, rates and unit rates

Front

What is a ratio?

Back

A ratio is a comparison of two quantities that shows the relative size of one quantity to another, often expressed as 'a to b' or a:b.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you find the total number of items in a ratio?

Back

To find the total number of items in a ratio, add the parts of the ratio together. For example, in a ratio of 3:2, the total is 3 + 2 = 5.

Front

What is a unit rate?

Back

A unit rate is a comparison of two different quantities when they are combined together, expressed as a quantity per one unit of another quantity.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you calculate a unit rate?

Back

To calculate a unit rate, divide the first quantity by the second quantity. For example, if 50 miles are driven in 2 hours, the unit rate is 50 ÷ 2 = 25 miles per hour.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the ratio of pears to all fruit if there are 4 apples, 2 bananas, and 5 pears?

Back

The ratio of pears to all fruit is 5:11.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If my father paid $25.50 for 5 movie tickets, what is the unit rate per ticket?

Back

The unit rate is $5.10 per ticket.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

Are 120 calories in 2 servings and 360 calories in 6 servings equivalent in calories per serving?

Back

Yes, they are equivalent.

Tags

CCSS.6.RP.A.3B

Front

If 18 vocab words are learned in 2 hours, how many words are learned per hour?

Back

9 words per hour.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the ratio of students who prefer tacos to those who prefer pizza if 180 students prefer tacos?

Back

If 180 students prefer tacos in a ratio of 3 to 2, then 120 students prefer pizza.

Tags

CCSS.7.RP.A.3

Front

How do you express a ratio in simplest form?

Back

To express a ratio in simplest form, divide both parts of the ratio by their greatest common divisor.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2