Toán Lớp 7: a.$\frac{-3}{7}$ + $\frac{1}{6}$ – $\frac{4}{7}$ + 13 $\frac{11}{12}$ + $\frac{10}{12}$
b.23$\frac{1}{4}$ . $\frac{7}{5}$ – 14$\frac{1}{4}$ : $\frac{5}{7}$ + $\frac{7}{5}$
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Toán Lớp 7: a.$\frac{-3}{7}$ + $\frac{1}{6}$ – $\frac{4}{7}$ + 13 $\frac{11}{12}$ + $\frac{10}{12}$
b.23$\frac{1}{4}$ . $\frac{7}{5}$ – 14$\frac{1}{4}$ : $\frac{5}{7}$ + $\frac{7}{5}$
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