Adding and Subtracting decimals

Front

What is a decimal number?

Back

A decimal number is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 3.49 and 4.60 are decimal numbers.

Front

How do you add decimal numbers?

Back

To add decimal numbers, align the numbers by the decimal point and add each column starting from the right, carrying over if necessary.

Front

What is the result of adding 20.529 and 19.48?

Back

The result is 40.009.

Front

How do you subtract decimal numbers?

Back

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

Front

What is the difference between 4.8 miles and 2.75 miles?

Back

The difference is 2.05 miles.

Front

What is the addition equation that equals 7.29?

Back

The equation is 4.18 + 3.11.

Front

How do you find the sum of two decimal numbers?

Back

To find the sum, align the numbers by the decimal point and add them together.

Front

What is the sum of 35.61 and 12.93?

Back

The sum is 48.54.

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.