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4 Compară. VOOX a) 4 × 7 * 7 x 4 5 x 7*7 x 8 3 x 7*7 x 9 b) 56 7* 63: 7 497 * 35:7 21:7*70:7 aloula? c) 42:6* 42:7 28 7 28:4 14:2*14:7​