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Theory: Converting Roman numerals to Hindu–Arabic numerals

Task

What number is represented by the Roman number \(\displaystyle {\rm VII}\)?

Solution

Определение

\(\displaystyle {\rm I}\)\(\displaystyle {\rm II}\)\(\displaystyle {\rm III}\)\(\displaystyle {\rm IV}\)\(\displaystyle {\rm V}\)\(\displaystyle {\rm VI}\)\(\displaystyle \color{red}{\rm VII}\)\(\displaystyle {\rm VIII}\)\(\displaystyle {\rm IX}\)\(\displaystyle {\rm X}\)
\(\displaystyle 1\)\(\displaystyle 2\)\(\displaystyle 3\)\(\displaystyle 4\)\(\displaystyle 5\)\(\displaystyle 6\)\(\displaystyle \color{red}{7}\)\(\displaystyle 8\)\(\displaystyle 9\)\(\displaystyle 10\)

According to the table of correspondence, the Roman number \(\displaystyle {\rm VII}\) corresponds to number \(\displaystyle 7{\small .}\)

Answer: \(\displaystyle 7\).