Question

(+5)*(+7) b (+6)*(-7) c (-4)*(+8) c (-5)*(-9)

Answer 1

. a) (+5) x (+7) = +35
. b) (+6) x (-7) = -42
. b) (-4)  x (+8) = -32
. b) (-5) x (-9) = +45

Answer 2

a)(5)•(7)=35

b)(6)•(-7)=-42

c)(-4)•(8)=-32

d)(-5)•(-9)=45

Regla de signos:

➕•➖ =➖
➖ •➕ = ➖
➖ •➖ =➕