Question

5. Calcula
a) (7 – 4) + (9 – 5) = b) (2 + 6) + (5 – 8) =
c) (5 – 9) + (2 – 12) = d) (7 + 3) – (5 + 4) =
e) (8 – 12) – (2 – 5) = f) (10 – 7) – (–2 – 6) =
g) – (8 + 4) + (5 – 9) = h) – (6 – 2) – (7 – 9) = a) 6 + [5 + (7 + 2)] =
i) 8 + [4 – (3 + 5)] = j) 10 – [6 + (2 + 7)] =
k) 15 – [2 – (6 – 10)] = l) 15 – [10 – (8 + 4)] =
m) 12 – [7 – (2 – 10)] = n) (–6) + [5 + (2 – 12)] =
o) (–7) – [3 – (4 – 9)] = p) (2 – 10) + [5 – (8 + 2)] =
b) (12 – 3) – [1 – (2 – 6)] = q) [9 – (+5)] + [7 + (–10)] =
r) [10 – (–2)] – [5 – (+12)] = s) [8 – (6 + 4)] – (5 – 7) =

Answer 1

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