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thanhnhuenguyen
2 năm trước
giai giup mik Tính nhanh: a) 25. ( -2). 5 . ( -4). 23 b) ( -4). 6. ( + 125). (-25). (-8) c) 13.( -47) - 53. 13 d) 27. ( -67) + 33. ( - 27 ) đ) - 49. 65 + 36. ( - 49) + 49 e) 125. (-61).(-2)3 . ( -1)2n với n € N g) 136. ( -47) + 36. 47 h) ( -48).72 + 36. ( -304) ai choi ngoc rong bao nha
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