Solving Proportions

Front

What is a proportion?

Back

A proportion is an equation that states that two ratios are equal.

Tags

CCSS.7.RP.A.2A

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply the terms and then solve for the variable.

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CCSS.7.RP.A.2C

Front

If a/b = c/d, what is the cross-multiplication method?

Back

The cross-multiplication method states that a*d = b*c.

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CCSS.5.NF.B.5B

Front

What is the unit rate?

Back

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

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If 4 ice creams cost $3.20, what is the cost of 1 ice cream?

Back

$0.80

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a car travels 420 miles in 8 hours, what is its speed in miles per hour?

Back

The speed is 52.5 miles per hour.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you find the total cost using proportions?

Back

Set up a proportion comparing the known cost to the unknown cost, then solve for the unknown.

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CCSS.7.RP.A.3

Front

If one centimeter on a map represents 25 kilometers, how many kilometers does 3 centimeters represent?

Back

75 kilometers.

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CCSS.6.RP.A.3B

Front

What is the formula for finding distance using speed and time?

Back

Distance = Speed × Time.

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CCSS.6.NS.B.3

Front

If a conveyor belt moves 10,800 packages in 1 hour, how many packages does it move in 1 minute?

Back

180 packages.

Tags

CCSS.6.RP.A.3B