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 1.70 and 4.65?

Back

The sum of 1.70 and 4.65 is 6.35.

Front

What is the result of 7.9 minus 3.47?

Back

The result of 7.9 minus 3.47 is 4.43.

Front

How do you find the total of multiple decimal numbers?

Back

To find the total of multiple decimal numbers, add them together by aligning the decimal points and summing each column.

Front

What is the sum of 3.35, 1.4, and 3.65?

Back

The sum of 3.35, 1.4, and 3.65 is 8.4.

Front

What is the difference between 80.93 and 68?

Back

The difference between 80.93 and 68 is 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 decimals?

Back

A common mistake is not aligning the decimal points, which can lead to incorrect sums.

Front

How can you check your work after adding or subtracting decimals?

Back

You can check your work by reversing the operation (subtracting the sum from one of the addends) or by estimating the answer.