Toán Lớp 9: Khai phương tích 12.30.40 được:
(A) 1200 ; (B) 120 ; (C) 12 ; (D) 240
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Toán Lớp 9: Khai phương tích 12.30.40 được:
(A) 1200 ; (B) 120 ; (C) 12 ; (D) 240
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