Decimal Multiplication

Front

What is decimal multiplication?

Back

Decimal multiplication is the process of multiplying numbers that include decimal points. It involves aligning the numbers, ignoring the decimal points during multiplication, and then placing the decimal point in the product based on the total number of decimal places in the factors.

Front

How do you multiply a whole number by a decimal?

Back

To multiply a whole number by a decimal, multiply as if the decimal is not there, then place the decimal point in the product. The decimal point is placed so that the total number of decimal places in the product equals the total number of decimal places in the factors.

Front

Calculate: 4 x 2.05

Back

8.2

Front

Calculate: 1.7 x 9

Back

15.3

Front

Calculate: 42 x 0.4

Back

16.8

Front

Calculate: 1.3 x 4

Back

5.2

Front

Calculate: 97 x 0.14

Back

13.58

Front

What is the product of a number and zero?

Back

The product of any number and zero is always zero.

Front

What happens when you multiply two decimals?

Back

When you multiply two decimals, you multiply as if they are whole numbers and then place the decimal point in the product based on the total number of decimal places in both factors.

Front

What is the rule for multiplying decimals?

Back

Count the total number of decimal places in both numbers being multiplied. The decimal point in the product should be placed so that it has the same number of decimal places.