Multiplication+&+Division

I found this funny video clip that shows how we can get a really wrong answer if we don't use the correct procedure.

Watch the clip where Costello tries to prove that 7 x 13 = 28.﻿ See if you can work out what Costello is doing wrong.

How should he have worked out the sum to get the correct answer? What is the correct answer?

Use the discussion tab to share your responses.

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