WEBVTT
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The weather forecast was announced to be ten degrees in Cairo, and negative two degrees in London.
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Calculate the difference in temperatures between the cities.
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Our keyword here is difference.
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In mathematics, difference means subtraction.
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So we will be subtracting ten and negative two.
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Again, to find the difference in these temperatures, we need to subtract ten and negative two.
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So ten minus negative two is how we will find the difference between these temperatures.
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Well two negatives when multiplied together, actually turn positive.
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So ten plus two means the difference in the temperature in Cairo to London, would be a twelve degree difference.
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Let’s try to visualise this and take it a step further.
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If we would place these degrees on a number line, London would be at negative two and Cairo would be at positive ten.
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So when we say we wanna know the difference between these two temperatures, how far apart are they, how different are they, well we could count the spaces.
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And if we would count, it would result in twelve spaces.
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That’s because their temperature difference is twelve degrees.
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If you were in London at negative two and you added twelve degrees, you would be at the temperature that it is in Cairo, at ten degrees.
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Therefore, as we said, the difference in temperatures between Cairo and London is twelve degrees.