Question

you should remember that when you add any number to zero, you get that number. you can see an example on the number line. what do you think happens when you subtract a number from zero?

Explanation:

Step1: Define the operation

Let the number be $x$. The operation is $0 - x$.

Step2: Use the rule of subtraction

Subtraction is the inverse of addition. $0 - x=0+(-x)$. When we add the additive - inverse of $x$ to $0$, we get $-x$. For example, if $x = 3$, then $0-3=0+( - 3)=-3$.

Answer:

You get the additive - inverse (opposite) of the number. That is, if the number is $x$, then $0 - x=-x$.