Rates, Ratios, 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.

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 miles per hour or price per item.

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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 find a unit rate?

Back

To find a unit rate, divide the first quantity by the second quantity to express the comparison in terms of one unit.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If Sira jogs 1/2 mile and walks 3/4 mile, what is the unit rate of jogging to walking?

Back

2/3 mile.

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CCSS.7.RP.A.1

Front

How do you calculate average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken.

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CCSS.6.RP.A.3B

Front

If Melissa drives 238 miles in 5 hours, what is her average speed?

Back

48 MPH.

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CCSS.6.RP.A.3B

Front

How do you scale a recipe?

Back

To scale a recipe, multiply the ingredients by the same factor to maintain the proportions.

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CCSS.7.RP.A.2A

Front

If a recipe calls for 2 eggs to make 10 pancakes, how many eggs are needed for 40 pancakes?

Back

8 eggs.

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CCSS.6.RP.A.3B

Front

What does it mean to solve for a variable in an equation?

Back

To solve for a variable means to isolate the variable on one side of the equation to find its value.

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CCSS.6.EE.B.7