Odpowiedź:
1)
[tex](7-5\frac{2}{5}) . \frac{1}{4} \\(7-\frac{27}{5}) . \frac{1}{4}\\ \frac{8}{5} . \frac{1}{4} \\ \frac{2}{5} \\[/tex]
2)
[tex](\frac{7}{9} -4\frac{7}{72} ):\frac{11}{4} \\ (\frac{7}{9}-\frac{295}{72}) . \frac{4}{11} \\- \frac{239}{72} . \frac{4}{11} \\-\frac{239}{18} . \frac{1}{11} \\-\frac{239}{198} \\[/tex]
3)
[tex]6 . (\frac{11}{4})^{2} \\6 . \frac{121}{16} \\3 . \frac{121}{8} \\\frac{363}{8} \\[/tex]
4)
[tex](\frac{5}{7})^{2}:\frac{5}{7}\\ (\frac{5}{7})^{2} . (\frac{5}{7})^{-1} \\ (\frac{5}{7})^{2-1} \\( \frac{5}{7})^{1} \\ \frac{5}{7}[/tex]
5)
[tex](\frac{1}{3}-\frac{1}{4} )^{2} \\ (\frac{1}{12})^{2}\\ \frac{1}{144}[/tex]
6)
[tex]5. (\frac{1}{2})^{2} + 15. (\frac{1}{3})^{2}\\ 5. \frac{1}{4}+15 . \frac{1}{9} \\\frac{5}{4} +5 . \frac{1}{3}\\\\\frac{5}{4} +\frac{5}{3}\\ \frac{35}{12}\\ 2\frac{11}{12}[/tex]
7)
[tex]\frac{1}{9}-(\frac{5}{6}-\frac{2}{3})^{2}\\ \frac{1}{9}-(\frac{1}{6})^{2}\\ \frac{1}{9}-\frac{1}{36}\\ \frac{1}{12}[/tex]
Szczegółowe wyjaśnienie:
