Procenty

[Hubertusus]

Oblicz 55% wartości
\((1,6- \frac{2}{3} ):(0,4+ \frac{1}{3} )-0,4:( \frac{1}{2} ) ^2\)


i

Oblicz 2,625%wartości wyrażenia \([(4,3-2,23) :0,09-12:4 \frac{2}{7} - \sqrt{2,56} \cdot 100 ]:6,99\)

Proszę o pomoc to na jutro nie ogarniam zbytnio tego LaTeX'a więc sorry

[ewelawwy]

\(\frac{55}{100}\cdot \[(1,6- \frac{2}{3} ):(0,4+ \frac{1}{3} )-0,4:( \frac{1}{2} ) ^2\]=\frac{11}{20}\cdot [(\frac{16}{10}-\frac{2}{3}):(\frac{4}{10}+\frac{1}{3})-0,4:\frac{1}{4}]=\frac{11}{20}\cdot [(\frac{48}{30}-\frac{20}{30}):(\frac{12}{30}+\frac{10}{30})-0,4\cdot 4]=\\
=\frac{11}{20}\cdot(\frac{28}{30}:\frac{22}{30}-1,6)=\frac{11}{20}\cdot (\frac{14}{15}\cdot \frac{15}{11}-1,6)=\frac{11}{20}\cdot (\frac{14}{11}-\frac{16}{10})=\frac{14}{20}-\frac{176}{200}=\frac{140}{200}-\frac{176}{200}=-\frac{36}{200}=-\frac{18}{100}=-0,18\)

[ewelawwy]

\(0,02625\cdot [(4,3-2,23) :0,09-12:4 \frac{2}{7} - \sqrt{2,56} \cdot 100 ]:6,99=0,02625\cdot (2,07:0,09-12\cdot \frac{7}{30}-1,6\cdot 100):6,99=\\
=0,02625\cdot (23-\frac{42}{15}-160):6,99=0,02625\cdot (-137-2\frac{12}{15}):6,99=0,02625\cdot (-139\frac{12}{15}):6,99=\\
=-\frac{2625}{100000}\cdot \frac{2097}{15} : \frac{699}{10}=-\frac{2625}{100000}\cdot \frac{2097}{15} \cdot \frac{10}{699}=-\frac{175\cdot 3}{10000}=-0,0525\)

[Hubertusus]

dzięki wielkie bardzo mi pomogłaś