12/15 (math 7)

Front

What is a tip and how do you calculate it?

Back

A tip is a small amount of money given to someone for their service. To calculate a tip, multiply the total bill by the tip percentage (as a decimal). For example, for a $47 bill with a 30% tip: $47 x 0.30 = $14.10.

Front

How do you determine if you have enough money to make a purchase?

Back

To determine if you have enough money, subtract your total expenses from your starting amount. If the remaining amount is greater than or equal to the cost of the item, you can afford it.

Front

What is a discount and how do you calculate the new price after a discount?

Back

A discount is a reduction in the price of an item. To calculate the new price, multiply the original price by the discount percentage (as a decimal) and subtract that from the original price. For example, for a $807 computer with a 25% discount: $807 x 0.25 = $201.75; New price = $807 - $201.75 = $605.25.

Front

What is the formula for the area of a circle?

Back

The area of a circle is calculated using the formula A = πr², where A is the area and r is the radius of the circle.

Front

How do you divide fractions?

Back

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 convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 30% as a decimal is 0.30.

Front

What is the total amount after adding a tip to a bill?

Back

To find the total amount after adding a tip, calculate the tip amount and then add it to the original bill. For example, for a $47 bill with a $14.10 tip, the total is $47 + $14.10 = $61.10.

Front

What is the process for calculating total expenses?

Back

To calculate total expenses, add up all the amounts spent. For example, if you spent $87.35, $42.79, and $15.68, the total expenses are $87.35 + $42.79 + $15.68 = $145.82.

Front

How do you find the remaining balance in a bank account?

Back

To find the remaining balance, subtract total expenses from the starting balance. For example, if you start with $175 and spend $145.82, the remaining balance is $175 - $145.82 = $29.18.