Sagot :
You have to use PEMDAS.
[tex]8-1*0+2/2 \\ \\ 8-0+2/2 \\ \\ 8-0+1 \\ \\ 8+1 \\ \\ 9[/tex]
[tex]8-1*0+2/2 \\ \\ 8-0+2/2 \\ \\ 8-0+1 \\ \\ 8+1 \\ \\ 9[/tex]