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JARDIMMANOELION
Respondido

4- Calcule:
a) (+8). (+5) =
b) (-8). (-5) =
c) (+8).(-5) =
d) (-8). (+5) = ​

4 Calculea 8 5 B 8 5 C 85 D 8 5 class=

Resposta :

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[tex]a) \: \: ( + 8) \times ( + 5) \\ 8 \times 5 \\ 40[/tex]

[tex]b) \: \: ( - 8) \times ( - 5) \\ 8 \times 5 \\ 40[/tex]

[tex]c) \: \: ( + 8) \times ( - 5) \\ 8 \times ( - 5) \\ - (8 \times 5) \\ - 40[/tex]

[tex]d) \: \: ( - 8) \times ( + 5) \\ ( - 8) \times 5 \\ - (8 \times 5) \\ - 40[/tex]

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