can you give two-meaning math jokes???

Question

one meaning has sense and the other one is a little bit malicious..........

Answer 1

Try this one -
how can it be that - 1+1 = 1 and 1-1 = 2 ????
simple ...
a pregnant woman - she has a baby inside - they are two but actually stays one ! 1+1 = 1
when the baby goes out - ( 1-1 )... then they become two !

Answer 2

why is two times ten the same as two times eleven? because two times eleven is twenty-too.