Question

2) Efetue as multiplicações
a) (8).(+5)
b) (-8).(-5)
(+8).(5)
d) (-8).(+5)
e) (-3).(+9)
1 (+ 3).(-9)​

Answer 1

Resposta:

A) 40

B)40

C)40

D)-40

E)-27

F)-27

Answer 2

$2a)(8) \times ( + 5) = \\ 8 \times 5 \\ 40$

$b)( - 8) \times ( - 5) = \\ 8 \times 5 \\ 40$

$c)( + 8) \times (5) = \\ 8 \times 5 \\ 40$

$d)( - 8) \times ( + 5) = \\ - (8 \times 5) \\ - 40$

$e)( - 3) \times ( + 9) = \\ - (3 \times 9) \\ - 27$

$f)( + 3) \times ( - 9) = \\ - (3 \times 9) \\ - 27$