Question

2- Resolva:
a) (+5).(-4) =
b) (-30): (- 10) =
c) (+8) + (-12) =
d) (-20) + (-5) =
e) (-20) - (-5) =
f) (-7).(-5) =​

Answer 1

Resposta:

a=+5×-4=-20

b=-30:-10=+3

c=+8+-12=-4

d=-20+-5=-25

e-20--5=-15

f-7×-5=+35