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(-5/12+1/6)•31/2
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Răspuns :

Trombolistul

[tex]( - \frac{5}{12} + \frac{1}{6}) \times \frac{31}{2} = - \frac{3}{12} \times \frac{31}{2} = - \frac{1}{4} \times \frac{31}{2} = - \frac{1 \times 31}{4 \times 2} = - \frac{31}{8} [/tex]