$-\frac{3}{4} + (-\frac{1}{2}) = -\frac{3}{4} - \frac{2}{4} = -\frac{5}{4} = -1\frac{1}{4}$;
$-\frac{3}{4} + (-1) = -\frac{3}{4} - 1 = -1\frac{3}{4}$;
$-\frac{3}{4} + 2 = 1\frac{1}{4}$;
$-\frac{3}{4} + \frac{1}{4} = -\frac{2}{4} = -\frac{1}{2}$;
$-\frac{3}{4} + 0,5 = -\frac{3}{4} + \frac{1}{2} = -\frac{3}{4} + \frac{2}{4} = -\frac{1}{4}$;
$-\frac{1}{2} + (-\frac{1}{2}) = -\frac{2}{2} = -1$;
$-\frac{1}{2} + (-1) = -1\frac{1}{2}$;
$-\frac{1}{2} + 2 = 1\frac{1}{2}$;
$-\frac{1}{2} + \frac{1}{4} = -\frac{2}{4} + \frac{1}{4} = -\frac{1}{4}$;
$\frac{1}{2} + 0,5 = -\frac{1}{2} + \frac{1}{2} = 0$;
$\frac{1}{2} + (-\frac{1}{2}) = 0$;
$\frac{1}{2} + (-1) = -\frac{1}{2}$;
$\frac{1}{2} + 2 = 2\frac{1}{2}$;
$\frac{1}{2} + \frac{1}{4} = \frac{2}{4} + \frac{1}{4} = \frac{3}{4}$;
$\frac{1}{2} + 0,5 = \frac{1}{2} + \frac{1}{2} = 1$;
$0 + (-\frac{1}{2}) = -\frac{1}{2}$;
$0 + (-1) = -1$;
$0 + 2 = 2$;
$0 + \frac{1}{4} = \frac{1}{4}$;
$0 + 0,5 = 0,5$;
$-2\frac{1}{4} + (-\frac{1}{2}) = -2\frac{1}{4} - \frac{2}{4} = -2\frac{3}{4}$;
$-2\frac{1}{4} + (-1) = -3\frac{1}{4}$;
$-2\frac{1}{4} + 2 = \frac{1}{4}$;
$-2\frac{1}{4} + \frac{1}{4} = -2$;
$-2\frac{1}{4} + 0,5 = -2\frac{1}{4} + \frac{1}{2} = -2\frac{1}{4} + \frac{2}{4} = -1\frac{3}{4}$.

1 − 2 = −1;
1 − (−3) = 4;
1 − (−1) = 2;
$1 - (-\frac{1}{6}) = 1\frac{1}{6}$;
$1 - \frac{1}{2} = \frac{1}{2}$;
−6 − 2 = −8;
−6 − (−3) = −3;
−6 − (−1) = −5;
$-6 - (-\frac{1}{6}) = -5\frac{5}{6}$;
$-6 - \frac{1}{2} = -6\frac{1}{2}$;
$\frac{1}{3} - 2 = -1\frac{2}{3}$;
$\frac{1}{3} - (-3) = 3\frac{1}{3}$;
$\frac{1}{3} - (-1) = 1\frac{1}{3}$;
$\frac{1}{3} - (-\frac{1}{6}) = \frac{2}{6} - (-\frac{1}{6}) = \frac{3}{6} = \frac{1}{2}$;
$\frac{1}{3} - \frac{1}{2} = \frac{2}{6} - \frac{3}{6} = -\frac{1}{6}$;
0 − 2 = −2;
0 − (−3) = 3;
0 − (−1) = 1;
$0 - (-\frac{1}{6}) = \frac{1}{6}$;
$0 - \frac{1}{2} = -\frac{1}{2}$;
$-\frac{1}{2} - 2 = -2\frac{1}{2}$;
$-\frac{1}{2} - (-3) = 2\frac{1}{2}$;
$-\frac{1}{2} - (-1) = \frac{1}{2}$;
$-\frac{1}{2} - (-\frac{1}{6}) = -\frac{3}{6} - (-\frac{1}{6}) = -\frac{2}{6} = -\frac{1}{3}$;
$-\frac{1}{2} - \frac{1}{2} = -1$.