Black Belt Review Flashcard

Front

What is the unit price?

Back

The unit price is the cost per single unit of a product, calculated by dividing the total cost by the number of units.

Front

How do you calculate the unit price of an item?

Back

To calculate the unit price, divide the total cost by the number of items. For example, if 4 boxes of cereal cost $12.60, the unit price is $12.60 ÷ 4 = $3.15 per box.

Front

What is a scale on a map?

Back

A scale on a map is a ratio that represents the relationship between distance on the map and actual distance on the ground.

Front

If the scale of a map is 1/4 inch = 90 miles, how do you find the actual distance represented by a measurement on the map?

Back

Multiply the measurement in inches by the number of miles represented by each inch according to the scale. For example, 1.5 inches × 90 miles/inch = 135 miles.

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.

Front

In a bag of marbles, if there are 5 blue and 10 green marbles, what is the ratio of green marbles to blue marbles?

Back

The ratio of green marbles to blue marbles is 10:5, which simplifies to 2:1.

Front

What is a unit rate?

Back

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

Front

How do you find the unit rate of speed?

Back

To find the unit rate of speed, divide the total distance traveled by the total time taken. For example, if a train travels 1,230 miles in 5 hours, the unit rate is 1,230 miles ÷ 5 hours = 246 mph.

Front

What is the formula to calculate earnings per hour?

Back

To calculate earnings per hour, divide the total earnings by the total hours worked. For example, if Leslie earned $14.00 for 2 hours, her earnings per hour are $14.00 ÷ 2 = $7.00 per hour.

Front

What is the importance of unit rates in real-life situations?

Back

Unit rates help compare prices, speeds, and other quantities, making it easier to make informed decisions.