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khanhlinh3582
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Bài 1: Thực hiện phép tính bằngcawchs lợp lý nêu có thể:
a, \frac{7 }{8 }7 8 . 23\frac{a}{b}5 6.\frac{a}{b}7 8 - \sqrt[n]{A}9 25
a, \frac{7 }{8 }7 8 . 23\frac{a}{b}5 6.\frac{a}{b}7 8 - \sqrt[n]{A}9 25