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lhtaphuoctien0109
2 năm trước
Câu 6 : Cho hình vẽ Biết AB = 6cm và . Tính AM và BM Câu 7 : Cho đoạn thẳng AB = 4 cm. Trên tia AB lấy điểm C sao cho AC = 1 cm. a)Tính CB b)Lấy điểm D thuộc tia đối của BC sao cho BD = 2 cm. Tính CD Bài 8: Tính tổng – 1 + 3 – 5 + 7 - . . . . + 97 – 99 Giup mình với
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