Question

Помогите, пожалуйста, не могу решить!
18 21/53•27/34•42 2/5•47 2/9–125/161•8 216/617•15 17/40•22 31/36=?

Answer 1

$1) 18 frac{21}{53} * frac{27}{34} *42 frac{2}{5} * 47frac{2}{9} = frac{975*27*212*425}{53*34*5*9} =29250 \ \ 2) frac{125}{61} *8 frac{216}{617} *15 frac{17}{40} *22 frac{31}{36} = frac{125*5152*617*823}{61*617*40*36} =6033 frac{458}{549} \ \ 3) 29250-6033 frac{458}{549} =23216 frac{91}{549}$