You can't take a bigger number from a smaller number ...
When you add the answer is always bigger ...
When you subtract the answer is always smaller ...
When you multiply, the answer is always bigger ...
When you divide the answer is always smaller ...
You have to add from right to left ...
One is a prime number ...
Fractions are little numbers ...
There is only one way to solve this problem ...
There is only one answer to this problem ...
I can't do it unless someone tells me how to do it ...
I can't do it without the formula ...
Math is hard and only certain types of people can do it ...
You have to know everything about whole numbers before you can do fractions ...
You have to know algebra before you can learn about calculus ...
You have to know about calculus before you can be a mathematician ...
Math is easier for boys than girls ...

(adapted from the Mathman Don Cohen)