Задание
Какому римскому числу равно число \(\displaystyle 78{\small?}\)
Решение
| десятки | единицы | |||
| \(\displaystyle 70\) | \(\displaystyle +\) | \(\displaystyle 8\) | \(\displaystyle =\) | \(\displaystyle 78\) |
| \(\displaystyle {\rm LXX}\) | \(\displaystyle +\) | \(\displaystyle {\rm VIII}\) | \(\displaystyle =\) | \(\displaystyle {\rm LXXVIII}\) |
Ответ: \(\displaystyle {\rm LXXVIII}{\small.}\)