Decimal Mania  Long Addition & Subtraction With Decimal Numbers
By: University of Waterloo, Ontario, Canada
Ready to test your knowledge of how to add or subtract numbers with decimal places?
That’s the challenge in this interactive exercise. You are asked to add or subtract numbers with up to three decimal places, a good test of your ability to work with numbers at the fifth or sixth grade level.
You will face 20 questions, with the game keeping score on how well you have done.
If you get a question wrong, the game will give you a second chance to get it right before marking it down in the wrong answers box . See if you can get 20/20 right!
