چندتا \(\frac{2}{4}\) می شود 10؟
5
20
40
15
\( \begin{array}{l}?\; \times \frac{2}{4} = 10\;\; \to \;\;?\; \times \frac{1}{2} = 10\\\\ \to \;\;?\; = 10 \times 2 = 20\end{array}\)