Suitable for ages 5 to 7. Multiplication Boy shows Charlie's parents how to do mental multiplication in order to save the birthday party from disaster. He works out how to solve multiplication challenges even though he is not sure about his times tables.

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Mr and Mrs Sharma can’t work out how many sausages to buy for Charlie’s birthday party. They are trying to count it out using chocolate buttons, but they are getting in a right mess. Multiplication Boy comes to the rescue, but loses his trusty number line en route. Can he find another way to work out the answer? What if he uses the commutative law of multiplication and facts he already knows? And will Mrs Sharma have any chocolate button left by the end of it all?

This clip is from the BBC series A World Without Maths. In a land where people have forgotten how to do maths, our superheroes, Multiplication Boy and Division Girl, are called upon to save confused citizens from their maths-based predicaments! A series of seven short films to help young children (five to seven) get to grips with multiplication and division.

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For Class Clips users, the original reference for the clip was p03pq5q8.

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Teaching Maths?

Children might explore multiplications problems where the answers are just outside their current knowledge of the times tables. For example, you might set out a small pile of toys and a set of party bags and try this problem: ‘Mr and Mrs Sharma really need some help planning the rest of Charlie’s party! There are 11 children coming to the party. They want to put two toys in each party bag. What is the calculation we need to do? How many toys will they need?’

To explore the commutative law you might ask: ‘Does it matter which way around the numbers go before the equals sign? Is 11 x 2 the same as 2 x 11? ‘ For those children who are confident you could ask ‘How can you prove this to me?’ Some children might use the objects or pictures to help them.

Others may be ready to use known facts and addition to solve the problems.

This clip will be relevant for teaching Maths at KS1 in England, Wales and Northern Ireland and at First Level in Scotland.

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