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11. Efectuați calculele: 7 20 2 = -(27/10 123); 14 :1 5 63 15 10 63 25 a) 2 c) 1/2 + ( 1 17/38) 2. Calculaţi: 4 18 75 7 16 12 35 14 27 0 7 110 + 3/12 - 11) (4 12/3-² 18 25 2​