Unit 3 Test Review 7.4d 7.4b 7.4e

Front

What is the unit rate?

Back

The unit rate is a comparison of any two units, where one of the units is 1. It is often used to determine the cost per item or the speed per hour.

Front

How do you calculate the unit rate?

Back

To calculate the unit rate, divide the total amount by the number of units. For example, if you earn $20.40 in 3 hours, the unit rate is $20.40 ÷ 3 = $6.80 per hour.

Front

What is the formula to find the percentage of a number?

Back

The formula to find the percentage of a number is: (Part/Whole) × 100. For example, if 30 out of 75 people got tickets, the percentage is (30/75) × 100 = 40%.

Front

How do you convert inches to centimeters?

Back

To convert inches to centimeters, multiply the number of inches by 2.54. For example, 7.5 inches is equal to 7.5 × 2.54 = 19.05 cm.

Front

What is the cost per slice of pizza if a pizza with 8 slices costs $12?

Back

The cost per slice is calculated by dividing the total cost by the number of slices: $12 ÷ 8 = $1.50 per slice.

Front

If a 6-ounce package contains 45 pieces, how many pieces are in a 10-ounce package?

Back

To find the number of pieces in a 10-ounce package, set up a proportion: 45 pieces/6 ounces = x pieces/10 ounces. Solving gives x = 75 pieces.

Front

What is the relationship between ounces and pieces in a package?

Back

The relationship can be expressed as a ratio or a unit rate, showing how many pieces correspond to a specific weight in ounces.

Front

How do you round to the nearest hundredth?

Back

To round to the nearest hundredth, look at the third decimal place. If it is 5 or greater, round up the second decimal place by one. If it is less than 5, keep the second decimal place the same.

Front

What is 40% of 75?

Back

To find 40% of 75, multiply 75 by 0.40: 75 × 0.40 = 30.

Front

How do you find the total cost from a unit price?

Back

To find the total cost, multiply the unit price by the number of units. For example, if a slice of pizza costs $1.50 and you buy 4 slices, the total cost is $1.50 × 4 = $6.