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 value of 0.5 + 0.3?

Back

0.5 + 0.3 = 0.8

Front

What is the value of 1.2 - 0.7?

Back

1.2 - 0.7 = 0.5

Front

How do you compare two decimal numbers?

Back

To compare two decimal numbers, look at the digits from left to right, starting with the highest place value. The first number that differs determines which is larger.

Front

What is the value of 2.5 + 3.4?

Back

2.5 + 3.4 = 5.9

Front

What is the value of 5.6 - 2.1?

Back

5.6 - 2.1 = 3.5

Front

What is the value of 0.48 + 0.18?

Back

0.48 + 0.18 = 0.66

Front

What is the value of 6.75 - 2.43?

Back

6.75 - 2.43 = 4.32