Answer::
[tex]\begin{gathered} 85\mleft(10\mright)\to850 \\ 100\mleft(85\mright)\to8,500 \\ 80\times50\to4,000 \\ 800\times50\to40,000 \end{gathered}[/tex]Explanation:
We evaluate the given expressions:
[tex]\begin{gathered} 85\mleft(10\mright)=85\times10=850 \\ 100(85)=100\times85=8,500 \end{gathered}[/tex]Next:
[tex]\begin{gathered} 80\times50=8\times10\times5\times10 \\ =8\times5\times10\times10 \\ =40\times100 \\ =4,000 \end{gathered}[/tex]Finally:
[tex]\begin{gathered} 800\times50=8\times100\times5\times10 \\ =8\times5\times100\times10 \\ =40\times1000 \\ =40,000 \end{gathered}[/tex]So the matched expressions are:
[tex]\begin{gathered} 85\mleft(10\mright)\to850 \\ 100\mleft(85\mright)\to8,500 \\ 80\times50\to4,000 \\ 800\times50\to40,000 \end{gathered}[/tex]