Add and Subtract 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.

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 7.9 and 3.47?

Back

11.37

Front

What is the difference between 7.9 and 3.47?

Back

4.43

Front

What is 5.66 + 4.25?

Back

9.91

Front

What is 3.3 + 2.22?

Back

5.52

Front

What is 34 + 10.18?

Back

44.18

Front

What is mental math?

Back

Mental math is the ability to perform calculations in your head without the use of calculators or paper.

Front

What is the first step in adding decimals?

Back

The first step is to align the numbers by the decimal point.