Выполняем вычитание чисел

1. $$19.4 - (-7.8) = 19.4 + 7.8 = 27.2$$
2. $$4.6 - 9.2 = - (9.2 - 4.6) = -4.6$$
3. $$0 - 8.9 = -8.9$$
4. $$-24.8 - 16.2 = - (24.8 + 16.2) = -41$$
5. $$-5.3 - (-12.16) = -5.3 + 12.16 = 12.16 - 5.3 = 6.86$$
6. $$0 - (-13.1) = 0 + 13.1 = 13.1$$
7. $$- \frac{5}{22} - (-\frac{17}{33}) = - \frac{5}{22} + \frac{17}{33} = - \frac{5 \cdot 3}{22 \cdot 3} + \frac{17 \cdot 2}{33 \cdot 2} = - \frac{15}{66} + \frac{34}{66} = \frac{34 - 15}{66} = \frac{19}{66}$$
8. $$\frac{3}{14} - \frac{5}{7} = \frac{3}{14} - \frac{5 \cdot 2}{7 \cdot 2} = \frac{3}{14} - \frac{10}{14} = \frac{3 - 10}{14} = \frac{-7}{14} = -\frac{1}{2}$$
9. $$2\frac{1}{3} - (-3\frac{1}{5}) = 2\frac{1}{3} + 3\frac{1}{5} = \frac{2 \cdot 3 + 1}{3} + \frac{3 \cdot 5 + 1}{5} = \frac{7}{3} + \frac{16}{5} = \frac{7 \cdot 5}{3 \cdot 5} + \frac{16 \cdot 3}{5 \cdot 3} = \frac{35}{15} + \frac{48}{15} = \frac{35 + 48}{15} = \frac{83}{15} = 5\frac{8}{15}$$

Ответ:

1. 27.2
2. -4.6
3. -8.9
4. -41
5. 6.86
6. 13.1
7. $$\frac{19}{66}$$
8. $$\frac{-1}{2}$$
9. $$5\frac{8}{15}$$