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multiplication posts

No zeros Brainteaser

by David, 20 February 2019 | 2 comments

Brain icon

Which two whole numbers – without any zeros – multiply together to make 1 000 000?

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Card sums Activity

by David, 18 February 2016 | 0 comments

You will need A cheap deck of cards Permanent marker Someone to play with Calculators for checking (optional) Making the deck Go through the deck of cards, and take out all the 10s, jacks, queens, kings and jokers. Put these cards aside for now.

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Napier’s bones Activity

by David, 18 June 2013 | 0 comments

four strips of paper with numbers on them. The top number on each strip is highlighted - 4, 6, 7, 0

How did people multiply before calculators were invented? You could try doing it in your head, but you could also use a mechanical calculator, such as this set of Napier’s bones.

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