[tex]1. \\a) - \text{pusto}\\b) 4\frac23=\frac{3*4+2}3=\frac{12+2}3=\frac{14}3\\\\2. \\a) \frac38=\frac{21}{56}\\\\b) \frac47=\frac{20}{35}\\\\c) \frac{16}{28}=\frac{4}7\\\\d) \frac{15}{60}=\frac14[/tex]
[tex]3. \\a) 2\frac4{11}+\frac7{11}=2\frac{11}{11}=3\\\\b) 1\frac23+\frac35=1\frac{10}{15}+\frac{9}{15}=1\frac{19}{15}=2\frac{4}{15}\\\\c) 1-\frac9{13}=\frac{13}{13}-\frac9{13}=\frac4{13}\\\\d) 3\frac12-\frac37=3\frac{7}{14}-\frac{6}{14}=3\frac1{14}\\\\e) 2\frac14-\frac35=2\frac{5}{20}-\frac{12}{20}=1\frac{25}{20}-\frac{12}{20}=1\frac{13}{20}\\\\f) \frac38*\frac49=\frac{1}{2}*\frac{1}{3}=\frac16\\\\g) 1\frac17*1\frac34=\frac87*\frac74=\frac{2}{1}*\frac{1}{1}=2\\\\h) \frac23*9=\frac{2}{1}*3=2*3=6[/tex]
