Mr. R.’s World of Math

Monsters, Monsters,
Mostly scare me,
This one’s bald,

This one’s hairy!

There’s never 1,

There’s never 2,

They come in 3’s,

It’s what they do!
3, then 6,
Then 9, then 12,
Now 15 monsters on my shelf!

Start with 3,

Then 6,

/

Then 9,
//

Monsters scare me,
Every time!