Question

(1/2)-(9/25) решите, пожалуйста)

Answer 1

$frac{1}{2}- frac{9}{25}= frac{1}{2}* 1- frac{9}{25}*1= frac{1}{2}* frac{25}{25} - frac{9}{25}* frac{2}{2}= frac{1*25}{2*25}- frac{9*2}{25*2}=$
$=frac{1*25-9*2}{25*2}= frac{25-18}{50}= frac{7}{50}= frac{7*1}{5*10}= frac{7}{5}* frac{1}{10}= frac{7*2}{5*2}* frac{1}{10}= frac{14}{10}* frac{1}{10}=$
$=1.4*0.1=0.14$