Question

Tính E : E = 4/ 7 : 1/ 0,14 + 68%

Answer 1

\(\frac{4}{7}:\frac{1}{0,14}+68\%\)

\(=\frac{4}{7}:\frac{100}{14}+\frac{68}{100}=\frac{4}{7}:\frac{50}{7}+\frac{17}{25}\)

\(=\frac{4}{7}\cdot\frac{14}{100}+\frac{68}{100}=\frac{4\cdot14}{7\cdot100}+\frac{17}{25}\)

\(=\frac{1\cdot2}{1\cdot25}+\frac{17}{25}=\frac{2}{25}+\frac{17}{25}\)

\(=\frac{2+17}{25}=\frac{19}{25}\)

Answer 2

\(E=\frac{4}{7}:\frac{1}{0,14}+68\%\)

\(E=\frac{4}{7}:\frac{1}{\frac{7}{50}}+\frac{17}{25}\)

\(E=\frac{4}{7}+\frac{50}{7}+\frac{17}{25}\)

\(E=\frac{57}{7}+\frac{17}{25}=\frac{404}{35}\)

Answer 3

E = \(\frac{4}{7}:\frac{1}{0,14}+68\%\)

E = \(\frac{4}{7}:\frac{50}{7}+\frac{17}{25}\)

E = \(\frac{2}{25}+\frac{17}{25}\)

E = \(\frac{19}{25}\)

Answer 4

\(E=\frac{4}{7}\div\frac{1}{0.14}+68\%\)

\(E=\frac{4}{7}\div\frac{1}{0,14}+\frac{17}{25}\)

\(E=\frac{2}{25}+\frac{17}{25}\)

\(E=\frac{19}{25}\)