[tex]1-2+3-4+5-6+7-8+1599-1600 [/tex]
Add and subtract from left to right.
[tex]1-2=-1 \ \textgreater \ -1+3-4+5-6+7-8+1599-1600 \ \textgreater \ -1+3=2 [/tex]
[tex]2-4+5-6+7-8+1599-1600 \ \textgreater \ 2-4=-2 [/tex]
[tex]-2+5-6+7-8+1599-1600 \ \textgreater \ -2+5=3 [/tex]
[tex]3-6+7-8+1599-1600 \ \textgreater \ 3-6=-3 [/tex]
[tex]-3+7-8+1599-1600 \ \textgreater \ -3+7=4[/tex]
[tex]4-8+1599-1600 \ \textgreater \ 4-8=-4 \ \textgreater \ -4+1599-1600[/tex]
[tex]-4+1599=1595 \ \textgreater \ 1595-1600 \ \textgreater \ 1595-1600=-5[/tex]
Therefore our answer is -5.
Hope this helps!
