Toán Lớp 5: 7 $\frac{5}{9}$ – 1$\frac{2}{5}$ =? A . 6$\frac{3}{4}$ B . $\frac{61}{4}$ C . 5$\frac{1}{4}$ D . 6$\frac{7}{45}$
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Toán Lớp 5: 7 $\frac{5}{9}$ – 1$\frac{2}{5}$ =? A . 6$\frac{3}{4}$ B . $\frac{61}{4}$ C . 5$\frac{1}{4}$ D . 6$\frac{7}{45}$
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