Question

(15/100+0,8x0,7)x7,1 plz dau coroana

Answer 1

$\frac{15}{100} = \frac{3}{20}$

$0.8 = \frac{8}{10} (simplificat \: cu \: 2) = \frac{4}{5}$
$0.7 = \frac{7}{10}$
$7.1 = \frac{71}{10}$
$(\frac{3}{20} + \frac{4}{5} \times \frac{7}{10} ) \times \frac{71}{10} =$
$( \frac{3}{20} + \frac{28}{50} ) \times \frac{71}{10}$
(prima fractie se amplifica cu 5, iar a doua cu 2
$(\frac{15}{100} + \frac{56}{100}) \times \frac{71}{10}$
$\frac{71}{100} \times \frac{71}{10} = \frac{5041}{1000}$