Question

РЕШИТЕ СРОЧНО УРАВНЕНИЕ 19,6/1 целая 1/4=u/0,25

Answer 1

$frac{19,6}{1 frac{1}{4} } = frac{u}{0,25}; \ frac{ frac{98}{5} }{ frac{5}{4} }= frac{u}{ frac{1}{4} }; \ frac{98}{5}: frac{5}{4}=u: frac{1}{4}; \ frac{392}{25}=4u; \ 4u*25=392*1; \ 100u=392; \ u=392:100; \ u=3,92$
Или
$frac{19,6}{1 frac{1}{4} } = frac{u}{0,25}; \ 19,6*0,25=1 frac{1}{4}u; \ 4,9=1,25u; \ u=4,9:1,25; \ u=3,92$