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12 Calculați: a 0,75: 0,73; d 256,314: 256,314; g 8,746: 8,742 : 8,743; b 4,111: 4,1%; e 8,5917: 8,5916; h 10,75 10,73: 10,78; c 7,86: 7,85; f 2,310: 2,36: 2,32; i 1,414: 1,47 1,42.​