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trihay123
2 năm trước
Bài 1: Tính chu vi hình tứ giác ABCD, biết cạnh AB =16cm, BC = 20cm, cạnh CD bằng nửa tổng AB và BC. Cạnh AD gấp đôi hiệu của AB và BC. bài 2: (6x8 – 48): (10 +11 +12 +13 +14) giúp mình 2 câu này nha
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