-28 + 5 = -23
-15 + (-12) = -15 - 12 = -27
0 - 18 = -18
100 - 108 = -8
-18 - 10 = -28
$$\frac{-1}{2} + (-\frac{1}{8}) = -\frac{1}{2} - \frac{1}{8} = -\frac{4}{8} - \frac{1}{8} = -\frac{5}{8}$$
-6.7 + 2.8 = -3.9
-30 + ?
-20 + ?
0 - 1 = -1
103 - ?
-15 - 1 = -16
$$\frac{1}{?} + \frac{1}{4}$$
-5.3 + 3.5 = -1.8
Ответ: -23, -27, -18, -8, -28, -5/8, -3.9, -1, -16, -1.8