Decimal long multiplication is based on the idea that you treat the numbers as whole numbers (thus multiplying them by powers of 10) and then adjust the position of the decimal point afterwards.
The errors that I see include
The feedback for wrong answers in this quiz covers most of those. Please save the quiz pages if you want them, you don’t need to link here unless you have no intranet. When I have completed the series, I’ll pop a page up with easy access to all the quizzes.
Keith Burnett 2004 - 2010