EXERCICIS D’OPERACIONS COMBINADES (1) (2) 12 + 5 -7 -10 + 3 – 4 = (3) 25 – 12 + 30 - 8 + 13 = (4) 18 + 9 – 7 + 12 – 5 + 14 – 6 = (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) [12 – 5·(3·2 - 4)] – 2 · 5 = (23) 24 : 4 : 4 =
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