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

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 the sum of 0.5 and 0.3?

Back

0.5 + 0.3 = 0.8

Front

What is the difference between 1.2 and 0.7?

Back

1.2 - 0.7 = 0.5

Front

If you have $10.00 and spend $2.50, how much do you have left?

Back

$10.00 - $2.50 = $7.50

Front

What is 3.75 + 2.25?

Back

3.75 + 2.25 = 6.00

Front

What is 5.5 - 1.2?

Back

5.5 - 1.2 = 4.3

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's 5 or more, round up; if it's less than 5, round down.

Front

What is the value of 0.9 + 0.1?

Back

0.9 + 0.1 = 1.0