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vannghia113kk
2 năm trước
Với mỗi số X, ký hiệu [X] là số nguyên lớn nhất không vượt quá X (gọi là phần nguyên của X). Giá trị của biểu thức [6,5]× [2/3] + [2] × 7,2 + [8,4] – 6,6 là:
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