Add a decimal point in the answer space, lined up with the others. Regroup the top number. 8∙5 is 8 units ... light back to the islands in this free game from BBC Bitesize.

The New York Times has another excellent little puzzle game ... numbers: The goal number here is 135. I have six numbers in little circles below that number that I need to use in order to add ...

While adding up your grocery bill in the supermarket, you’re probably not thinking how important or sophisticated our number system ... Now, what if our “decimal” arithmetic, often called ...