I have some math in an enumerate environment but as you can see in the picture the equations are below the numbers and not aligned horizontally. Why is that and how can I align them?
MWE
\documentclass{article}
\usepackage{amsmath}
\begin{document}
\begin{enumerate}
\item
\begin{equation*}
\sum_{m=0}^{n}a = (n+1)\cdot a
\end{equation*}
\item
\begin{align*}
& \delta(n)\ast \delta{n} = \delta(n)\\
& \delta(n) \ast x(n)=x(n)
\end{align*}
\end{enumerate}
\end{document}

$\begin{aligned}[t] ... \end{aligned}$instead ofequationoralign. – Peter Grill Aug 18 '16 at 00:55