Adding and Subtracting Decimals

Front

What is the process of adding decimals?

Back

To add decimals, align the numbers by the decimal point and add each column starting from the right, carrying over if necessary.

Front

How do you subtract decimals?

Back

To subtract decimals, align the numbers by the decimal point and subtract each column starting from the right, borrowing if necessary.

Front

What is the sum of 10.9, 8.6, and 12.4?

Back

31.9 hours.

Front

Calculate the sum of 32.15 and 24.15.

Back

56.30.

Front

What is 21 + 4.09?

Back

25.09.

Front

What is the result of 9.43 - 3.34?

Back

6.09.

Front

Find the difference between 80.93 and 68.

Back

12.93.

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 misaligning the decimal points, which can lead to incorrect sums or differences.

Front

How do you handle carrying over in decimal addition?

Back

If the sum of a column exceeds 9, carry over the extra value to the next column to the left.