👤

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


Răspuns :

[tex] \frac{15}{100} = \frac{3}{20} [/tex]

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