Adding and Subtracting 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. It is used to represent numbers that are not whole numbers.

Front

How do you add decimals?

Back

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

Front

How do you subtract decimals?

Back

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

Front

What is the result of 6.8 - 2.93?

Back

3.87

Front

What is the result of 50 - 8.32?

Back

41.68

Front

If Jeff had $58.90 and withdrew $25.00, how much does he have left?

Back

$33.90

Front

What is the result of 22 + 4.57 + 8.9?

Back

35.47

Front

If Tony ran 4.8 miles and James ran 2.75 miles, how much farther did Tony run?

Back

2.05 miles

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.

Front

What is a common mistake when adding or subtracting decimals?

Back

A common mistake is not aligning the decimal points, which can lead to incorrect sums or differences.