## Decimal multiplication

- Download the JQZ file of 10 decimal multiplication questions for reloading into HotPotatoes
- Save or use the Web page with the decimal multiplication quiz as exported from HotPotatoes [ Opens in a new window. Like all HotPotatoes tests, you will need JavaScript enabled on your Web browser ]

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

- Not adjusting the position of the decimal point at all, or by the wrong number of places
- Missing out some of the zeros when multiplying by figures in the 10 or 100 column
- Getting mixed up with the carries when adding up at the end

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.