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**How many sets of 5 are there?**

Five times Here are three sets of 10. How many sets of 5 are there?

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**There are two sets of 5 in each 10 so there must be six sets.**

Five times There are two sets of 5 in each 10 so there must be six sets.

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Five times So what is 6 x 5 ?

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Five times 30

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Five times So what is 8 x 5 ?

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Five times 40

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**There is a pattern in the answers we have found. What do you notice?**

Five times There is a pattern in the answers we have found. What do you notice? 2 x 10 = 4 x 5 3 x 10 = 6 x 5 4 x 10 = 8 x 5 5 x 10 = 10 x 5

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**I can see doubling and halving.**

Five times 2 x 10 = 4 x 5 3 x 10 = 6 x 5 I can see doubling and halving. 4 x 10 = 8 x 5 5 x 10 = 10 x 5

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Five times Give me an example. 2 x 10 = 4 x 5 3 x 10 = 6 x 5 4 x 10 = 8 x 5 5 x 10 = 10 x 5

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Five times 2 x 10 = 4 x 5 4 is doubled to get 8. 10 is halved to get 5. 3 x 10 = 6 x 5 4 x 10 = 8 x 5 5 x 10 = 10 x 5

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**What should go on this card?**

Five times What should go on this card? 2 x 10 = 4 x 5 3 x 10 = 6 x 5 4 x 10 = 8 x 5 5 x 10 = 10 x 5

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Five times 2 x 10 = 4 x 5 3 x 10 = 6 x 5 It should be 3½ x 10 = 7 x 5 4 x 10 = 8 x 5 5 x 10 = 10 x 5

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Five times So what is 7 x 5? 2 x 10 = 4 x 5 3 x 10 = 6 x 5 3½ x 10 = 7 x 5 4 x 10 = 8 x 5 5 x 10 = 10 x 5

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Five times 2 x 10 = 4 x 5 3 x 10 = 6 x 5 35 3½ x 10 = 7 x 5 4 x 10 = 8 x 5 5 x 10 = 10 x 5

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Today we will be learning: how to use a known fact to work out an unknown fact how to use doubling and halving.

Today we will be learning: how to use a known fact to work out an unknown fact how to use doubling and halving.

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