Задание
Найти сумму:
\(\displaystyle 12367+78954+14589= {?}\)
| \(\displaystyle 1\) | \(\displaystyle 2\) | \(\displaystyle 3\) | \(\displaystyle 6\) | \(\displaystyle 7\) | |
| \(\displaystyle +\) | |||||
| \(\displaystyle 7\) | \(\displaystyle 8\) | \(\displaystyle 9\) | \(\displaystyle 5\) | \(\displaystyle 4\) | |
| \(\displaystyle +\) | |||||
| \(\displaystyle 1\) | \(\displaystyle 4\) | \(\displaystyle 5\) | \(\displaystyle 8\) | \(\displaystyle 9\) | |
Решение
Найдем сумму первых двух чисел:
\(\displaystyle 12367+78954=91321\).
| 1 | 2 | 3 | 6 | 7 | |
| + | |||||
| 7 | 8 | 9 | 5 | 4 | |
| 9 | 1 | 3 | 2 | 1 | |
Сложим результат суммирования первых двух чисел с третьим числом:
\(\displaystyle 91321+14589=105910\).
| 9 | 1 | 3 | 2 | 1 | |
| + | |||||
| 1 | 4 | 5 | 8 | 9 | |
| 1 | 0 | 5 | 9 | 1 | 0 |
Ответ: \(\displaystyle 105910{\small.}\)