Odpowiedź :
[tex]\frac{1\cdot5}{2\cdot5}-\frac{4\cdot2}{5\cdot2}+1\frac{1\cdot2}{5\cdot2}=\\\\=\frac{5}{10}-\frac{8}{10}+1\frac{2}{10}=\\\\=-\frac{3}{10}+1\frac{2}{10}=\\\\=-\frac{3}{10}+\frac{12}{10}\\\\=\boxed{\frac{9}{10}}[/tex]
Odpowiedź:
[tex]\frac{1}{2}-\frac{4}{5}+1\frac{1}{5} = \frac{9}{10}[/tex]
Szczegółowe wyjaśnienie:
[tex]\frac{1}{2}-\frac{4}{5}+1\frac{1}{5} = \frac{1}{2}-\frac{4}{5}+\frac{6}{5} =\frac{1}{2}+\frac{2}{5} = \frac{5}{10}+\frac{4}{10} = \frac{9}{10}[/tex]