Nguyễn Khắc Bình
2025-12-21 11:12:35
\(\frac{4}{9} + \frac{1}{4}\)= \(\frac{16+9}{9}=\) \(\frac{25}{9}\).
\(\frac{4}{9} + \frac{1}{4}\)= \(\frac{16+9}{9}=\) \(\frac{25}{9}\).