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mideptrai
2 năm trước
Khi giải 1 bài toán, bạn Lan phải nhân một số với 0,25 rồi cộng với 75, nhưng Lan đã làm nhầm như sau: bạn lấy số đó chia cho 0,25 rồi trừ đi 75. Mặc dù vậy vẫn ra kết quả đúng. Hỏi số đó là số nào?
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