Here are some free funny math worksheets that you can download and use:
1. Pirate Math: A worksheet with pirate-themed math problems, including addition, subtraction, multiplication, and division. [Download](https://www.math-drills.com/pirate-math-drills) (PDF)
2. Monster Math: A worksheet with monsters and math problems to solve. Includes addition, subtraction, multiplication, and division. [Download](https://www.math-drills.com/monster-math-drills) (PDF)
3. Space Math: A worksheet with space-themed math problems, including addition, subtraction, multiplication, and division. [Download](https://www.math-drills.com/space-math-drills) (PDF)
4. Funny Faces Math: A worksheet with funny faces and math problems to solve. Includes addition, subtraction, multiplication, and division. [Download](https://www.math-drills.com/funny-faces-math-drills) (PDF)
5. Pet Math: A worksheet with pet-themed math problems, including addition, subtraction, multiplication, and division. [Download](https://www.math-drills.com/pet-math-drills) (PDF)
Note: These worksheets are designed for elementary school students and are meant to be a fun and engaging way to practice math skills.
Here are some additional funny math worksheets that you can use:
* [Math is Super Cool](https://www.supercoloring.com/math-worksheet/funny-math/) (PDF)
* [Math Jokes and Puns](https://www.jokingmotor.com/funny-math-jokes-puns-worksheet/) (PDF)
* [Math Ninja Training](https://www.mathcounts.org/sites/default/files/2019-07/Math-Ninja-Training-Sheet.pdf) (PDF)
I hope this helps!