\begin{frame}
  \frametitle{Laws of Exponents}

  \begin{block}{Laws of Exponents}
    If $a$ and $b$ are positive real numbers, then:
    \begin{enumerate}
      \smallskip\pause
      \item $a^{x+y} = a^x \cdot a^y$
      \smallskip\pause\pause\pause\pause\pause
      \item $a^{x-y} = \frac{a^x}{a^y}$
      \smallskip\pause\pause\pause\pause
      \item $(a^x)^y = a^{xy}$
      \smallskip\pause\pause\pause\pause\pause\pause
      \item $(ab)^x = a^x b^x$
    \end{enumerate}
  \end{block}
  
  \setcounter{beamerpauses}{0}
  \pause\pause\pause
  \begin{exampleblock}{}
    \begin{enumerate}
      \smallskip
      \item $a^{3+4} = \pause a\cdot a\cdot a\cdot a\cdot a\cdot a\cdot a = \pause (a\cdot a\cdot a) \cdot (a\cdot a\cdot a\cdot a) = \pause a^3 \cdot a^4$
      \smallskip\pause\pause
      \item $a^{5-2} = \pause a\cdot a\cdot a =\pause \frac{(a\cdot a\cdot a) \cdot (a\cdot a)}{a\cdot a} = \frac{a^5}{a^2}$
      \smallskip\pause\pause
      \item $(a^2)^3 = \pause (a\cdot a)^3 = \pause (a\cdot a)\cdot (a\cdot a) \cdot (a\cdot a) = \pause a^6 = \pause a^{2\cdot 3}$
      \smallskip\pause\pause
      \item $(ab)^3 =\pause (ab) \cdot (ab) \cdot (ab) =\pause (a\cdot a\cdot a) \cdot (b\cdot b\cdot b) =\pause a^3b^3$
    \end{enumerate}
  \end{exampleblock}
\end{frame}