Calculati media aritmetica a numerelor;
x (12.1 - 11.9) 4 + 4.5 si y (2.3 +1.5) 12.5.(2.05 - 1.25)
b) * = 1.17.52.3 : y = 0.1² +1.44:12 si Z=(3.25 -1.345 ) 1.2
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