Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a decimal point. For example, 0.5 is a decimal that represents 5/10.

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 sum of 27.63 and 15.04?

Back

The sum of 27.63 and 15.04 is 42.67.

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 difference directly below the other decimal points.

Front

What is 22 + 4.57 + 8.9?

Back

The sum is 35.47.

Front

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

Back

Jeff has $33.90 left in his account.

Front

What is the result of adding 20.529 and 19.48?

Back

The result is 40.009.

Front

Lisa had a budget of $100. After buying a shirt for $27.99 and pants for $25.99, how much does she have left?

Back

Lisa has $46.02 left.

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 decimals?

Back

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