Question - Simple Addition Problem

Solution:

Um die Summe zu berechnen, addieren wir die Zahlen spaltenweise:

\[ \begin{array}{c@{\;}c@{\;}c@{\;}c} & 2 & 5 & 7 \\ + & 3 & 2 & 1 \\ \cline{1-4} & 5 & 7 & 8 \\ \end{array} \]

Daher ist \( 257 + 321 = 578 \).

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