In this video, Salman Khan of Khan Academy gives an introduction to percent and decimals.
Khan Academy

In this video, Salman Khan of Khan Academy demonstrates division with decimals.
Khan Academy

In this video, Salman Khan of Khan Academy shows you how to subtract decimals.
Khan Academy

In this video, Salman Khan of Khan Academy shows you how to add decimals.
Khan Academy

Lesson on how to solve word problems involving decimals.
Math Goodies

Great site to use to get a scientific calculator to solve or check your problems you are working on. Larger and easy to use.
Scientific Calculator

Review your math as you progress from one marking period to the next.
Edhelper.com

How to complete a long division problem using decimals
Math is Fun

An introduction to decimals which describes place value, how to read a decimal, and decimals as fractions.
Math is Fun

A functional scientific calculator with the look and feel of a real calculator for teaching how to use a calculator over the web.
Calculator.com
