Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 3.14 is a decimal.

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 answer directly below the other decimal points.

Front

What is the sum of 4.18 and 3.11?

Back

The sum of 4.18 and 3.11 is 7.29.

Front

How do you subtract decimals?

Back

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

Front

What is 94 - 4.8?

Back

94 - 4.8 equals 89.2.

Front

What is the total cost if Annie buys shoes for $47.82 and a top for $13.36?

Back

The total cost is $47.82 + $13.36 = $61.18.

Front

If Annie gives $100 for her purchase of $61.18, how much change does she receive?

Back

Annie receives $100 - $61.18 = $38.82 in change.

Front

What is 55.78 + 4.6?

Back

55.78 + 4.6 equals 60.38.

Front

What decimal numbers do the money pieces represent if they are 3.49 and 4.60?

Back

The money pieces represent the decimal numbers 3.49 and 4.60.

Front

What is the importance of aligning decimal points when adding or subtracting?

Back

Aligning decimal points ensures that each digit is in the correct place value, which is crucial for accurate calculations.