Question

Resolva as multiplicações à seguir.

a) (-6) x 5 x (-4) =
b) 4 x (-6) x (-1)-(-2) x 3 =
c) (-4) x 2-(-2) x 1 x (-3) x (-4) =​

Answer 1

Olá!

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Basta usar essa regra :

( + ) ( + ) = +

( - ) ( - ) = +

( + ) ( - ) = -

( - ) ( + ) = -

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( - 6 ) × 5 × ( - 4 )

- 30 × ( - 4 )

+ 120

4 × ( - 6 ) × ( - 1 ) - ( - 2 ) × 3

- 24 × ( - 1 ) - - 6

+ 24 + 6

+ 30

( - 4 ) × 2 - ( - 2 ) × 1 × ( - 3 ) × ( - 4 )

- 8 - - 2 × + 12

- 8 - - 24

- 8 + 24

+ 16