Ratios/Rates/Proportions

Front

What is a ratio?

Back

A ratio is a comparison of two quantities by division, showing how many times one value contains or is contained within the other.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a rate?

Back

A rate is a specific kind of ratio that compares two different units, such as miles per hour or cost per item.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

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What is a unit rate?

Back

A unit rate is a rate in which the second quantity is 1, allowing for easy comparison of different rates.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you calculate the cost per pound?

Back

To find the cost per pound, divide the total cost by the total weight in pounds.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a car travels 330 miles in 5 hours, how do you find the speed?

Back

To find the speed, divide the total distance by the total time: Speed = Distance / Time.

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CCSS.6.RP.A.3B

Front

What is the formula for finding the unit rate of customers per hour?

Back

Unit Rate = Total Customers / Total Hours.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you determine how many customers can be served in a given time?

Back

First, find the rate of customers served per minute or hour, then multiply that rate by the total time available.

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CCSS.6.RP.A.3B

Front

If Ernie travels 195 miles in 3 hours, how do you find the distance he will travel in 5 hours?

Back

First, find the speed (miles per hour) by dividing the distance by time, then multiply that speed by 5 hours.

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CCSS.6.RP.A.3B

Front

What is the relationship between ratios and proportions?

Back

A proportion states that two ratios are equal, showing a relationship between two sets of quantities.

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CCSS.6.RP.A.3A

Front

How can you express a ratio in simplest form?

Back

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

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CCSS.6.RP.A.1

CCSS.6.RP.A.2