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3. Compară: 2x 10 ∆4x5 7 x 100∆2 x 100 27 x 10∆3 x 100 6x 100 ∆93 x 10 (16+32) x 10 ∆100 x (51-13) (13+12) x 100∆ 42 x 100 (27-15) x 10∆23 x 10 + 51 (100-29) x 100∆ 10x (235 +632)​