Dau coroana!

a) (–6–8+5+1):( +3–9–2+4) = b) (+3–9–4+8):( –5+4–2+4) =

c) (–8+7–6–5):( –3+9–1–4) = d) (+3–7–9+5):( –6–2+5+1) =

e) (+8–2–5–9):( –7–2+4+1) = f) (–6+8–5–1):( –2+3+4–6) =

g) (–8–3+2+7):( +9–6–8+4) = h) (–5–4+3+6):( –7+2–8+4) =

i) (–2+8–9+1):( –5–4+7+1) = j) (+3–8–2+4):( –1–6+3+5) =