Word Problems with Decimals

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form, where the denominator is a power of ten, represented with a decimal point.

Front

How do you divide a total cost by the number of items to find the cost per item?

Back

To find the cost per item, divide the total cost by the number of items. For example, if 2 pineapples cost $7.50, the cost per pineapple is $7.50 ÷ 2 = $3.75.

Front

What is the formula to calculate total earnings based on hourly wage and hours worked?

Back

Total earnings = Hourly wage × Hours worked. For example, if Cassidy earns $8.95 per hour and works 5 hours, her total earnings are $8.95 × 5 = $44.75.

Front

How do you calculate the total cost of multiple items bought at the same price?

Back

To calculate the total cost, multiply the price of one item by the number of items. For example, if Jessica buys 5 boxes of chocolates at $5.25 each, the total cost is 5 × $5.25 = $26.25.

Front

What is the process to find the change received after a purchase?

Back

To find the change received, subtract the total cost from the amount paid. For example, if groceries cost $16.83 and paid with a $20 bill, the change is $20 - $16.83 = $3.17.

Front

What does it mean to round a decimal?

Back

Rounding a decimal means adjusting its value to make it simpler while keeping it close to the original value, often to a specified number of decimal places.

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator by the denominator. For example, 1/4 = 0.25.

Front

What is the significance of the decimal point in a number?

Back

The decimal point separates the whole number part from the fractional part in a decimal number, indicating the value of each digit.

Front

How do you add decimals?

Back

To add decimals, align the numbers by the decimal point and add as you would whole numbers, placing the decimal point in the sum directly below the other decimal points.

Front

What is the importance of estimating in decimal calculations?

Back

Estimating helps to quickly assess the reasonableness of an answer before performing exact calculations, making it easier to catch errors.