Multiplying Decimals by Whole Numbers

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 multiply a decimal by a whole number?

Back

To multiply a decimal by a whole number, multiply as if there were no decimal, then place the decimal point in the product based on the number of decimal places in the original decimal.

Front

Estimate the product of 5.04 and 8.

Back

The best estimate is 5 x 8 = 40.

Front

What is the value of 0.09 x 7?

Back

0.09 x 7 = 0.63, which is 63 hundredths.

Front

What does '63 hundredths' mean?

Back

'63 hundredths' means 63 parts out of 100, or 0.63 in decimal form.

Front

If a CD costs $14.79, how much do 6 CDs cost approximately?

Back

Approximately $90, since 15 x 6 = 90.

Front

What is the total cost of 3 sandwiches at $5.79 each?

Back

The total cost is $17.37.

Front

What is the first step in multiplying decimals?

Back

The first step is to ignore the decimal point and multiply the numbers as if they were whole numbers.

Front

How do you determine where to place the decimal in the product?

Back

Count the total number of decimal places in the numbers being multiplied and place the decimal in the product accordingly.

Front

What is the product of 5.04 and 8?

Back

The product is 40.32.