Ratios and Proportions Pre-Test

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 proportion?

Back

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

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CCSS.7.RP.A.2A

Front

How do you determine if two ratios form a proportion?

Back

To determine if two ratios form a proportion, cross-multiply and check if the products are equal.

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CCSS.7.RP.A.2A

Front

What is the formula to find the price per gallon?

Back

Price per gallon = Total cost / Number of gallons.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a 12 pack of Coke costs $3.50, what is the cost per can?

Back

Cost per can = Total cost / Number of cans = $3.50 / 12 = $0.29.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the better buy: a 12 pack for $3.50 or a 6 pack for $1.80?

Back

The 12 pack is the better buy because it costs less per can.

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CCSS.6.RP.A.3B

Front

Solve the proportion: 3/4 = x/12. What is x?

Back

x = 9.

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CCSS.7.RP.A.2B

Front

What is the ratio of STARS to SQUARES if there are 3 STARS and 4 SQUARES?

Back

The ratio of STARS to SQUARES is 3 to 4.

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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

It means that they represent the same relationship between quantities.

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CCSS.6.RP.A.3A

Front

How can you simplify a ratio?

Back

To simplify a ratio, divide both terms by their greatest common factor.

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CCSS.6.RP.A.1

CCSS.6.RP.A.2