Question

3 - ( 4/9 vezes ( . ) 9/10 - 1/15 ) ( 3/2 + 5/8 vezes ( . ) 4/5 )

Answer 1

$3 - (\frac{4}{9} * \frac{9}{10} - \frac{1}{5} )( \frac{3}{2} + \frac{5}{8} * \frac{4}{5} ) =\\ \\ 3 - ( \frac{4}{10} - \frac{1}{5} )( \frac{3}{2} + \frac{4}{8} ) =\\ \\ 3-( \frac{2}{5} - \frac{1}{5} )( \frac{3}{2} + \frac{1}{2} ) = \\ \\ 3- ( \frac{1}{5} )( \frac{4}{2} ) =\\ \\ 3 -( \frac{1}{5} )(2) =\\ \\ 3 - \frac{2}{5} =\\ \\MMC = 5\\ \\ \frac{15-2}{5} = \\ \\ \frac{13}{5}$