Evaluate the expression $\left\lceil{\frac54}\right\rceil+\left\lfloor{-\frac54}\right\rfloor$.
Hey, what's the ceiling of $\frac{5}{4}$? The smallest integer greater than $\frac{5}{4}$ is 2, so the ceiling of $\frac{5}{4}$ is 2. Great. What floor of $-\frac{5}{4}$? The largest integer less than $-\frac{5}{4}$ is -2, so the floor of $-\frac{5}{4}$ is -2. So the answer is $2 + (-2) = 0$.

