Question

) Dê o resultado de cada multiplicação
a) (+7)x(-5) =
b) (-9)x(-8)=
c) (+10)x(+3) =
d) (+9)x(-11) =​

Answer 1

→ Cálculo :

A)

${(+7)\times(-5) }=\large\boxed{{\red{-35}}}$

B)

${(-9)\times(-8) }=\large\boxed{{\red{+72}}}$

C)

${(+10)\times(+3) }=\large\boxed{{\red{+30}}}$

D)

${(+9)\times(-11) }=\large\boxed{{\red{-99}}}$

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→ Regra de sinais :

( - ) ( - ) = +

( + ) ( + ) = +

( - ) ( + ) = -

( + ) ( - ) = -

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Att, PurpleStars ❤️