tolong dikerjakan y pakai cara mencari desimal dan persen....

[tex]1. \: \frac{1}{2} + \frac{1}{4} = \frac{2 + 1}{4} = \frac{3}{4} \\ 2. \: \frac{1}{2} + \frac{1}{5} = \frac{5 + 2}{10} = \frac{7}{10} \\ 3. \: \frac{1}{3} + \frac{1}{4} = \frac{4 + 3}{12} = \frac{7}{12} \\ 4. \: \frac{1}{3} + \frac{1}{6} = \frac{2 + 1}{6} = \frac{3}{6} = \frac{1}{2} \\ 5. \: \frac{1}{4} + \frac{1}{5} = \frac{5 + 4}{20} = \frac{9}{20} \\ 6. \: \frac{1}{2} \times \frac{1}{4} = \frac{1}{8} \\ 7. \: \frac{1}{2} \times \frac{1}{5} = \frac{1}{10} \\ 8. \: \frac{1}{3} \times \frac{1}{4} = \frac{1}{12} \\ 9. \: \frac{1}{3} \times \frac{1}{6} = \frac{1}{18} \\ 10. \: \frac{1}{4} \times \frac{1}{5} = \frac{1}{20} [/tex]