Add and Subtract Decimals

Front

What is the process of adding decimals?

Back

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

Front

What is the value of 4.62 + 7.7?

Back

The value is 12.32.

Front

What is 5.66 + 4.25?

Back

The sum is 9.91.

Front

What is 9.74 - 3.25?

Back

The result is 6.49.

Front

What is 6.7 - 2.33?

Back

The answer is 4.37.

Front

If Jenna buys a bag of gummy bears for $2.74 and pays with a $10 bill, how do you calculate her change?

Back

Subtract the cost from the amount paid: $10.00 - $2.74 = $7.26.

Front

What is the importance of aligning decimal points when performing addition or subtraction?

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 can you check your work after adding or subtracting decimals?

Back

You can check your work by reversing the operation: for addition, subtract the sum from one of the addends; for subtraction, add the difference to the subtracted number.