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Câu 1: Thực hiện phép tính a) -9-13-(-24)+11 b) 323 - 6 [ 3 - 7 .(- 9) c)(-3)^5 : (-3) ^3 -9 d) (-8) .16 -13.8 Câu 2: a) Tìm tất cả các ước của 20 b) Tìm năm bội của -4 Ai làm giúp em vs ạ em cảm ơn nhiều
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