Ratios and 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

What is a rate?

Back

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

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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 quantity by the number of units. For example, if you buy 4 pizzas for $68, the unit rate is $68 ÷ 4 = $17 per pizza.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If an elevator can hold 45 people in 20 minutes, how many people can it hold in 1 hour?

Back

135 people.

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CCSS.6.RP.A.3B

Front

If Einstein Bagels can make 300 bagels in 2 hours, how many can they make in 21 hours?

Back

3,150 bagels.

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CCSS.6.RP.A.3B

Front

How do you find the price per item?

Back

To find the price per item, divide the total cost by the number of items. For example, if 4 basketballs cost $36, the price per basketball is $36 ÷ 4 = $9.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

Which is a better buy: 3 sodas for $1.05 or 5 sodas for $1.15?

Back

5 sodas for $1.15 is the better buy.

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CCSS.6.RP.A.3B

Front

What is the formula for calculating a ratio?

Back

The formula for calculating a ratio is: Ratio = Quantity A / Quantity B.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What does it mean if two ratios are equivalent?

Back

Two ratios are equivalent if they represent the same relationship between quantities, meaning they simplify to the same fraction.

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CCSS.6.RP.A.3A

Front

How can you express a ratio as a fraction?

Back

A ratio can be expressed as a fraction by placing the first quantity over the second quantity. For example, the ratio 3:4 can be expressed as 3/4.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2