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 value of 20.529 + 19.48?

Back

40.009

Front

What is the value of 86.04 + 4.04?

Back

90.08

Front

What is the result of 7.05 - 4.6?

Back

2.45

Front

What is the difference when subtracting 27.96 - 16.2?

Back

11.76

Front

What is the sum of 27.63 + 15.04?

Back

42.67

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 decimals?

Back

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

Front

What should you do if the numbers have different decimal places?

Back

You can add zeros to the end of the shorter number to make the decimal places equal before performing the operation.