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14-09-2017
Mathematics

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Explain how using basic facts can help you find 10 X 20 X 30 X 40 mentally

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20-09-2017

Do 1 X 2 X 3 X 4 mentally then add the 4 zeros after your answer

Here:
1 X 2 X 3 X 4 = 24
so 10 X 20 X 30 X 40 = 240,000

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