Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form. It represents a part of a whole number, using a dot (.) to separate the whole number from the fractional part.

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 answer 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 answer directly below the other decimal points.

Front

What is the sum of 20.529 and 19.48?

Back

The sum is 40.009.

Front

What is the difference when you subtract 4.6 from 7.05?

Back

The difference is 2.45.

Front

If Pam had $135.62 and deposited $58.90, how much does she have now?

Back

Pam has $194.52 in her account.

Front

What is 50 minus 8.32?

Back

The result is 41.68.

Front

What is 6.8 minus 2.93?

Back

The result is 3.87.

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.