[tex]\begin{gathered} \text{when we have two different exponents, we must find a way to get the same exponent in both numbers, so we can sum them} \\ \text{for example,} \\ 3.6\times(10^6)=3.6\times(10^{5+1})=3.6\times10\times(10^5)^{} \\ =36\times10^5^{} \end{gathered}[/tex][tex]\begin{gathered} \text{ So the sum is equal to} \\ 2.3\times(10^5)+36\times(10^5)=38.3\times(10^5)^{} \end{gathered}[/tex]
