Explicație pas cu pas:
[tex]a) \frac{5 - 4}{9} = \frac{1}{9} [/tex]
[tex]b) \frac{11 - 9}{21} = \frac{2}{21} [/tex]
[tex]c) \frac{5 - 1}{19} = \frac{4}{19} [/tex]
[tex]d) \frac{7 - 6}{8} = \frac{1}{8} [/tex]
[tex]e) \frac{12 - 5}{7} = \frac{7}{7} = 1[/tex]
[tex]f) \frac{9}{16} - \frac{9}{16} = 0[/tex]
[tex]g) \frac{24 - 6}{25} = \frac{18}{25} [/tex]
[tex]h) \frac{68 - 51}{81 } = \frac{17}{81} [/tex]
