Calculate the value of the expression x - 1/3 for x = 5, x = 2 1/2, and x = -0.5.

Решение:

• При x = 5:

  \[ 5 - \frac{1}{3} = \frac{15}{3} - \frac{1}{3} = \frac{14}{3} = 4 \frac{2}{3} \]

• При x = 2 1/2 (или 2.5):

  \[ 2 \frac{1}{2} - \frac{1}{3} = \frac{5}{2} - \frac{1}{3} = \frac{15}{6} - \frac{2}{6} = \frac{13}{6} = 2 \frac{1}{6} \]

• При x = -0,5 (или -1/2):

  \[ -\frac{1}{2} - \frac{1}{3} = -\frac{3}{6} - \frac{2}{6} = -\frac{5}{6} \]

Ответ: 4 2/3; 2 1/6; -5/6.