ìm một phân số, biết rằng nếu lấy2/3 trừ đi phân số đó rồi chia cho 4/5 thì được . 5/24
Bài giải
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Phân số cần tìm là \(\dfrac{2}{3}-\left(\dfrac{5}{24}\cdot\dfrac{4}{5}\right)=\dfrac{2}{3}-\dfrac{1}{6}=\dfrac{3}{6}=\dfrac{1}{2}\)
