Resposta :
[tex]a) (+4) + (+1) + (+8) \\ 4 + 1 + 8 \\ 5 + 8 \\ \boxed{13}[/tex]
[tex]b)( - 9) + ( - 4) + ( - 3) \\ - 9 - 4 - 3 \\ - 13 - 3 \\ \boxed{ - 16}[/tex]
[tex]c)( + 3) + ( - 10) \\ 3 - 10 \\ \boxed{ - 7}[/tex]
[tex]d)( - 5) - ( + 8) \\ - 5 - 8 \\ \boxed{ - 13}[/tex]
[tex]e)( + 3) - ( + 5) \\ 3 - 5 \\ \boxed{ - 2}[/tex]
[tex]f)( - 1) - ( - 2) \\ - 1 + 2 \\ \boxed{1}[/tex]
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