Learn the basics of arrays. Mr Sharma needs to buy new pencils for the school but they only come in boxes of 5. How does he know how many he’s got? His attempts at guessing leave Mrs Barker in a sticky situation. This sounds like a job for Multiplication Boy! Luckily, our hero in A World Without Maths knows what to do. He speeds up Mr Sharma’s counting by showing him how to use arrays to multiply. Multiplication Boy and Mr Sharma also explore the commutative law of multiplication to solve some counting confusion. Will Mr Sharma be able to work out exactly how many pencils he’s buying? Will Mrs Barker manage to escape her pencil prison? And will the children ever actually get their new pencils?

Originally released by BBC Worldwide Learning, 2016. Streaming video file encoded with permission for digital streaming by Infobase on July 26, 2018.

Arrays (4:52); .