Area of a rectangle can be calculated by multiplying
the length and width of the rectangle. Any product
can be shown as the area of a rectangle. The length and
width are the factors and the product is the area.
Let's look at an interactive example where we can change
the length and width of the rectangle and the area created.
In this model the dimensions are natural numbers. A similar
model could be created that included decimal numbers for
the dimensions of the rectangle.

We will need some blocks to illustrate decimal products. You
will need to understand the value of each type of block:

If you are using The
Learning Equation math program, the directions for using Exploring Decimals
is on pages 20 and 21 of the Refresher accompanying the CD resources.

You have had an opportunity to visualize multiplication of decimals with
rectangles. Now it is time to learn how to multiply decimal numbers without a visual
aid.

There will be 3 digits after the
decimal in the answer, because there are 3 numbers after the decimal in the factors.

Line up the numbers as if there were no decimals.

Multiply as usual.

Count the total number of digits after the decimals in the factors.

The number of digits counted equals the number of digits after the decimal in the
quotient.

Place decimal in answer.

Enter your
name, then click enter. You will be given multiplying decimal questions to complete!
You will have to work the question out on paper, then enter the answer. The
applet will show you the steps if you need them.