4 − 0
We have four cookies. Watch what happens when we take away zero!
Here are our four yummy cookies. One, two, three, four.
Let's write the problem: four minus zero.
Look at this little zero. Zero means nothing — not even one!
So we take away nothing. Every cookie stays right where it is.
Let's count what's left: one, two, three, four.
Four minus zero is four. The number didn't change at all!
Remember: when you subtract zero, the number stays the same. You've got it!