a) [tex]2 *1\frac{1}{5} = 2 * \frac{6}{5} = \frac{12}{5}[/tex]
b)[tex]3*2\frac{2}{5} :4 = 3*\frac{12}{5} *\frac{1}{4} = \frac{9}{5}[/tex]c)[tex]3*1\frac{1}{9} +2\frac{5}{6} = 3*\frac{10}{9} +\frac{17}{6} = \frac{30*2}{18} +\frac{17*3}{18} =\frac{111}{18} =\frac{37}{6}[/tex]
