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