Пошаговое объяснение:

[tex]a) - 1 \frac{1}{3} + 5 \frac{2}{3} + ( - \frac{2}{3} ) + 4 + ( - 2 \frac{1}{3}) = 4 \frac{1}{3} + ( - \frac{2}{3}) + 4 + ( - 2 \frac{1}{3} ) = 3 \frac{2}{3} + 4 + ( - 2 \frac{1}{3} ) = 7 \frac{2}{3} + ( - 2 \frac{1}{3} ) = 5 \frac{1}{3} [/tex]

[tex]b) - \frac{1}{2} + ( - 8.5) + 11.5 + ( - 1 \frac{1}{2} ) + 14.5 = - 0.5 + ( - 8 .5) + 11.5 + ( - 1.5) + 14.5 = - 9 + 11.5 + ( - 1.5) + 14.5 = 2.5 + ( - 1.5) + 14.5 = 1 + 14.5 = 15.5[/tex]

[tex]3)0.25 + ( - 4 \frac{3}{4} ) + 8 + ( - 0.75) + 9.5 = 0.25 + ( - 4.75) + 8 + ( - 0.75) + 9.5 = - 4.5 + 8 + ( - 0.75) + 9.5 = 3.5 + ( - 0.75) + 9.5 = 2.75 + 9.5 = 12.25[/tex]