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

What is 94 - 4.8?

Back

89.2.

Front

What is the result of subtracting 5.67 from 12.34?

Back

7.67.

Front

How do you determine the difference between a predicted and actual measurement?

Back

Subtract the actual measurement from the predicted measurement.

Front

If Chicago was predicted to receive 1.254'' of rain and actually received .875'', how far was the prediction off?

Back

.379''.

Front

What is 55.78 + 4.6?

Back

60.38.

Front

Why is it important to align 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 results.