Question

Efetue as multiplicações:
a) (+ 7) . (+ 8) =
b) (– 6) . (– 4) =
c) (– 7) . (– 8) =
d) (– 5) . (+ 9) =

Answer 1

Explicação passo-a-passo:

a)+56

b)+24

c)+56

d)-45

Answer 2

A) (+ 7) . (+ 8) =
7 . 8
= 56

B) (- 6) . (- 4) =
6 . 4
= 24

C) (- 7) . (- 8) =
7 . 8
= 56

D) (- 5) . (+ 9) =
- (5 . 9)
= - 45