Unit 3 Review (Desmos)

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare proportions.

Front

How do you calculate a percentage discount?

Back

To calculate a percentage discount, multiply the original price by the percentage (as a decimal) and subtract that amount from the original price.

Front

What is the formula to find the area of a rectangle?

Back

Area = length × width.

Front

How do you find the unit rate?

Back

To find the unit rate, divide the total quantity by the number of units. For example, if you have 3 pounds of mac and cheese for $7.50, divide 3 by 7.50 to find the pounds per dollar.

Front

What is the meaning of 'per' in mathematical terms?

Back

'Per' means 'for each' or 'for every.' It is used to express rates or ratios.

Front

How do you calculate the area painted per can of paint?

Back

Divide the total area painted by the number of cans used. For example, if 50 square feet were painted with 4 cans, then 50 ÷ 4 = 12.5 square feet per can.

Front

What is the formula to calculate the total savings during a sale?

Back

Total savings = Original price × Discount percentage.

Front

How do you find a percentage of a number?

Back

To find a percentage of a number, multiply the number by the percentage (as a decimal). For example, to find 55% of 180, calculate 180 × 0.55.

Front

What is a double number line diagram?

Back

A double number line diagram is a visual tool that helps to represent relationships between two quantities, often used to solve problems involving ratios and proportions.

Front

How do you calculate the number of successful attempts in a percentage problem?

Back

Multiply the total attempts by the percentage (as a decimal). For example, for 40 attempts with 25% success, calculate 40 × 0.25.