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Write an expression for double a number ๐.
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First, letโs think about the word โdouble.โ
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What does โdoubleโ mean mathematically?
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If you have a double an amount, you have two times that amount.
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Our number is ๐.
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If we have double a number ๐, we have two times the number ๐.
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Two times can be written like this: two ๐ฅ.
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Bring down the ๐.
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So we have two times ๐.
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And thereโs one other way we can simplify this expression.
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When weโre multiplying a variable by a number, we donโt need the multiplication symbol.
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We write the two next to the ๐.
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And that means two times ๐.
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This expression represents double the number ๐, two times ๐.