1.
[tex]a) \: \frac{1}{5} - \frac{1}{5} = 0 \\ b) \: - \frac{12}{3} = - 4 \\ c) \: \frac{12}{4} = 3 \\ d) \: - \frac{3}{3} = - 1 \\ e) \: \frac{5}{5} = 1 \\ f) \: \frac{3}{3} = 1[/tex]
2.
[tex]a) \: \frac{10 - 21 + 1}{15} = - \frac{10}{15} = - \frac{2}{3} \\ b) \: \frac{ - 2 - 3 + 7}{14} = - \frac{1}{14} \\ c) \: \frac{5 - 4 + 6}{8} = \frac{7}{8} \\ d) \: \frac{2 + 3 + 5 - 24}{12} = \frac{ - 14}{12} = - \frac{7}{6} [/tex]
3.
[tex]a) \: - 5.1 + 4.1 = - 1 \\ b) \: 5.5 - 10.2 = - 5.3 [/tex]
4.
[tex]a) \: \frac{4 + 9 - 5}{6} = \frac{8}{6} = \frac{4}{3} \\ b) \: \frac{12 + 1 - 10}{12} = \frac{3}{12} = \frac{1}{4} \\ c) \: \frac{20 - 3 + 30}{20} = \frac{47}{30} \\ d) \: \frac{14 + 12 - 5}{28} = \frac{21}{28} = \frac{3}{4} \\ e) \: \frac{28 - 68 + 45}{60} = - \frac{5}{60} = - \frac{1}{12} [/tex]
[tex]f) \: \frac{42 - 1 - 3}{6} = \frac{38}{6} = \frac{19}{3} [/tex]
