The value of

\(\rm \frac{1}{5}+\frac{2}{5}+\frac{4}{10}+\frac{4}{5}-1= \)

1
\(-\frac{2}{10}\)
2
\(\frac{17}{10}\)
3
\(\frac{12}{10}\)
4
\(\frac{8}{10}\)

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