Odpowiedź:
9.12.
[tex](2\frac{1}{3} +5\frac{1}{3} ):1\frac{5}{12} =7\frac{2}{3}:\frac{17}{12} =\frac{23}{3} *\frac{12}{17} =\frac{23*4}{17} =\frac{92}{17} =5\frac{7}{17}[/tex]
9.13
[tex](3\frac{1}{8} :6\frac{2}{3} )*1\frac{3}{5} =(\frac{25}{8} :\frac{20}{3})*\frac{8}{5} =\frac{25}{8} *\frac{3}{20} *\frac{8}{5} =\frac{3}{4}[/tex]
9.14
[tex](2\frac{2}{3} -\frac{4}{5} )*1\frac{3}{7} =(2\frac{10}{15} -\frac{12}{15})*\frac{10}{7} =1\frac{13}{15} *\frac{10}{7} =\frac{28}{15} *\frac{10}{7} =\frac{8}{3} =2\frac{2}{3}[/tex]
Szczegółowe wyjaśnienie:
