Răspuns:
[tex] \frac{7}{72} [/tex]
Explicație pas cu pas:
[tex]a = 2 \frac{11}{18} + ( \frac{ - 5}{6} ) + ( - 1 \frac{7}{8} ) = [/tex]
[tex] = \frac{47}{18} + \frac{ - 5}{6} + \frac{ - 15}{8} = \frac{188}{72} + \frac{ - 60}{72} + [/tex]
[tex] + \frac{ - 135}{72} = \frac{ - 7}{72} [/tex]
[tex] | \frac{ - 7}{72} | = \frac{7}{72} [/tex]
