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

What is the process of subtracting decimals?

Back

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

Front

How do you align decimals when performing addition or subtraction?

Back

You align the decimal points of the numbers vertically to ensure that each digit is in the correct column.

Front

What is the value of 100.65 - 65.84?

Back

$34.81

Front

If a family drives for 10.9 hours, 8.6 hours, and 12.4 hours, how do you find the total driving time?

Back

Add the three time durations together: 10.9 + 8.6 + 12.4 = 31.9 hours.

Front

How do you determine how much more one amount is than another?

Back

Subtract the smaller amount from the larger amount.

Front

What is the difference between Paul’s and Steven’s amounts if Paul has $49.75 and Steven has $14.22?

Back

$49.75 - $14.22 = $35.53.

Front

How do you find the total weight of fruits picked if 12.34 pounds of apples and 9.56 pounds of raspberries are picked?

Back

Add the weights together: 12.34 + 9.56 = 21.9 pounds.

Front

What is the result of 80.93 - 68?

Back

$12.93.

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.