Question

b) (-8). (3) = -24
1) Atividades
2) Calcule as multiplicações de números naturais abaixo:
a) (-4).(+2) =
b) (-15).(+2)
c) (+6).(-3)
d) (-12).(+4)=
e) (+10) (-2)=​

Answer 1

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$a) \: \: {\purple{( - 4) \times ( + 2)}} \\{\purple{( - 4) \times 2}} \\ {\purple{ - (4 \times 2)}} \\ {\purple{ - 8}}$

$b) \: \: {\purple{( - 15) \times ( + 2)}} \\{\purple{( - 15) \times 2}} \\ {\purple{ - (15 \times 2)}} \\ {\purple{ - 30}}$

$c) \: \: {\purple{( + 6) \times ( - 3)}} \\ {\purple{6 \times ( - 3)}} \\ {\purple{ - (6 \times 3)}} \\ {\purple{ - 18}}$

$d) \: \: {\purple{( - 12) \times ( + 4)}} \\{\purple{ ( - 12) \times 4}} \\ {\purple{ - (12 \times 4)}} \\ {\purple{ - 48}}$

$e) \: \: {\purple{( + 10) \times ( - 2)}} \\{\purple{10 \times ( - 2)}} \\ {\purple{ - (10 \times 2)}} \\ {\purple{ - 20}}$

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