Rates and Unit Rates

Front

What is a rate?

Back

A rate is a ratio that compares two different kinds of quantities, such as distance and time.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a unit rate?

Back

A unit rate is a rate in which the second quantity is one unit. For example, 60 miles per hour is a unit rate.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

How do you calculate the unit rate?

Back

To calculate the unit rate, divide the first quantity by the second quantity.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If a 20-lb bag of dog food costs $23.44, what is the cost per pound?

Back

$1.17 per pound (calculated as $23.44 ÷ 20).

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the formula to find the cost per unit?

Back

Cost per unit = Total cost ÷ Number of units.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

If you buy 5 pounds of meat for $5.50, how much is it per pound?

Back

$1.10 per pound (calculated as $5.50 ÷ 5).

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is a ratio?

Back

A ratio is a comparison of two quantities, 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

How do you express a ratio?

Back

A ratio can be expressed in three ways: as a fraction, with a colon (e.g., 20:9), or with the word 'to' (e.g., 20 to 9).

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What is the ratio of 20 apples in the fridge to 9 apples on the table?

Back

20:9 or 20/9.

Tags

CCSS.6.RP.A.1

CCSS.6.RP.A.2

Front

What does it mean to round to the nearest cent?

Back

Rounding to the nearest cent means adjusting a number to the closest hundredth place, which is the second digit after the decimal point.

Tags

CCSS.5.NBT.A.4