Question

выполните действие а) 3 1/3+1 2/5 б) 2 1/12-1 7/12 в) 24*14/15 г) 4/5:20

Answer 1

$3 frac{1}{3} + 1frac{2}{5} = ( 3+1) +( frac{1}{3} + frac{2}{5} ) = 4+ frac{5+6}{15}= 4frac{11}{15}$
$2frac{1}{12} - 1 frac{7}{12} = frac{25}{12} - frac{19}{12} = frac{25-19}{12} = frac{6}{12} = frac{1}{2} =0,5$
$24* frac{14}{15} =8* frac{14}{5} = frac{112}{5} =22 frac{2}{4} =22,4$
$frac{4}{5} :20= frac{4}{5} * frac{1}{20} = frac{1}{5} * frac{1}{5} = frac{1}{25} =0,04$