Adding, Subtracting, & Multiplying Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a decimal point. For example, 0.5 is a decimal that represents 5/10.

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

How do you multiply decimals?

Back

To multiply decimals, multiply the numbers as if they were whole numbers, then count the total number of decimal places in both factors and place the decimal point in the product accordingly.

Front

What is the value of 12.94 - 20.18?

Back

The value is -7.24, indicating that 12.94 is less than 20.18 by 7.24.

Front

What is the total of 15.38, 6.25, and 12.04?

Back

The total is 33.67.

Front

If Micah had $10.52 after buying a book for $6.39, how much did he have before?

Back

Micah had $16.91 before going to the bookstore.

Front

What is the difference between 30 miles and 21.48 miles?

Back

The difference is 8.52 miles.

Front

How do you calculate total distance if you ride 34.75 miles five times a week?

Back

Multiply 34.75 by 5 to get a total of 173.75 miles.

Front

What is the first step in solving a decimal addition problem?

Back

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