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