Doubling and halving is a very efficient method for multiplying. We started by doubling 5 and then halving the other number. So if you have a problem like 5 x 12 it can become 10 x 6 which is much easier to work out in your head. We have some students who can work out a problem like 246 x 5!
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| Drawing an array of rows of ten. |
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| More arrays |
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| Drawing circles in the arrays; we are cooperating. |
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| These are the different arrays. |
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| Mrs Lyn was showing the arrays to the students. |
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| The students are watching and learning. |
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