Adding 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 with whole numbers, placing the decimal point in the answer directly below the other decimal points.

Front

What is the value of 0.1 + 0.2?

Back

0.1 + 0.2 = 0.3.

Front

What is the sum of 1.25 and 2.75?

Back

1.25 + 2.75 = 4.00.

Front

How do you round a decimal to the nearest whole number?

Back

To round a decimal to the nearest whole number, look at the digit to the right of the decimal point. If it is 5 or greater, round up; if it is less than 5, round down.

Front

What is 3.5 + 4.2?

Back

3.5 + 4.2 = 7.7.

Front

What is the sum of 0.75 and 0.25?

Back

0.75 + 0.25 = 1.00.

Front

If you add 5.5 and 2.3, what do you get?

Back

5.5 + 2.3 = 7.8.

Front

What is the result of 12.34 + 56.78?

Back

12.34 + 56.78 = 69.12.

Front

How do you check your addition of decimals?

Back

You can check your addition by subtracting one of the original numbers from the sum. If the result equals the other number, your addition is correct.