Nguyễn Ngọc Bảo An
Giới thiệu về bản thân
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2025-10-30 11:16:08
a) \(\frac{5}{9}-\left(\right.\frac{1}{3}\left.\right)^2=\frac49\)
b)\(\frac{1}{5}.\frac{- 3}{2}+\frac{- 17}{2}.\frac{1}{5}=-2\)
c) \(1+\left(\right.\frac{- 2}{5}+\frac{11}{13}\left.\right)-\left(\right.\frac{3}{5}-\frac{2}{13}\left.\right)=1\)