Here is a video which illustrates all the strategies we have been learning about - adjusting, doubling and halving, splitting one of the factors and 'chunking' into a set of sums which are easier to calculate then recombining. I like this video because it illustrates each method with a picture (you could do this too on squared paper or use cubes). Watch the video and at the end there is an example for you to try. Work in pairs or threes within your number groups. Use a whiteboard and some cubes or squared paper. We will post photos or videos of your illustrations below the video when you are ready.
By the way this video demonstrates how knowing your tables means you can just concentrate on thinking about the strategy.
18 x 5 from YouCubed on Vimeo.
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