👤

Efetue:

a) (+7) + (+6) = ___________
f) (–6) . (–1) = ___________

b) (+2) – (+4) = ___________
g) (–200) : (+25) = ___________

c) (+25) – (–20) = ___________
h) (–225) : (–15) = ___________

d) (–40) : (–4) = ___________
i) – 47 + 29 = ___________

e) (+9) . (– 9) = ___________
j) –30 – 60 = ___________​