Mr. R.’s World of Math

Zoe’s zero zipped and zoomed,
Rolled right round her red-walled room…

Zoe’s zero screamed a shout,
From her light-green zero’s snout!
What did Zoe’s zero say?
Here’s a math tip for today!
Adding makes most numbers grow,
But never when you add zero!
Add a zero?
That’s my name!
Your number always stays the same!