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daohatrang2003
2 năm trước
bài 1 8m2 3dm2=...m2 a.8,3m2 b.8,30m2 c.8,03m2 d.8,0003m2 bài 2 một hình thang có tổng độ dài hai cạnh là 6,5m a chiều cao là 3,4m thì diện tích hình thang đó là a.22,1 m2 b.11,05m2 c.22,1cm2 d11,05 cm bài 3 hình tam giác có độ dài đáy la5/7cm a chiều cao bằng 3/5 độ dài đáy.Tính diện tích tam giác đó
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