Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 3.14 is a decimal.

Front

How do you add decimals?

Back

To add decimals, align the numbers by the decimal point and add as you would whole numbers, placing the decimal point in the sum directly below the other decimal points.

Front

What is the sum of 10.9 and 8.6?

Back

19.5

Front

What is the sum of 12.4 and 19.5?

Back

31.9

Front

How do you subtract decimals?

Back

To subtract decimals, align the numbers by the decimal point and subtract as you would whole numbers, placing the decimal point in the difference directly below the other decimal points.

Front

What is 22.01 - 9.41?

Back

12.6

Front

What is the result of 55.78 + 4.6?

Back

60.38

Front

What is 21 + 4.09?

Back

25.09

Front

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

Back

8.4

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.