Задание
Найти сумму:
| \(\displaystyle +\) | \(\displaystyle 6\) | \(\displaystyle 2\) |
| \(\displaystyle 5\) | ||
Решение
1. Найдем сумму единиц числа \(\displaystyle 6\underline{2}\) (это число \(\displaystyle 2\)) с единицами числа \(\displaystyle \underline{5}\) (это само число \(\displaystyle 5\)):
\(\displaystyle 2+5=7{\small . }\)
| \(\displaystyle +\) | \(\displaystyle 6\) | \(\displaystyle \color{red}{ 2}\) |
| \(\displaystyle \color{red}{5}\) | ||
| \(\displaystyle ?\) | \(\displaystyle \color{red}{7}\) |
2. Сносим десятки числа \(\displaystyle \underline{6}2\) (это число \(\displaystyle 6\)):
| \(\displaystyle +\) | \(\displaystyle \color{red}{6}\) | \(\displaystyle 2\) |
| \(\displaystyle 5\) | ||
| \(\displaystyle \color{red}{6}\) | \(\displaystyle 7\) |
Таким образом,
| \(\displaystyle +\) | \(\displaystyle 6\) | \(\displaystyle 2\) |
| \(\displaystyle 5\) | ||
| \(\displaystyle 6\) | \(\displaystyle 7\) |
Ответ: \(\displaystyle 67{\small . }\)