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buichimchich21
2 năm trước
Một tổ công nhân phải trồng một số cây trong 3 đợt. Đợt I tổ trồng được 1/3 tổng số cây. Đợt II tổ trồng được 3/7 số cây còn phải trồng sau đợt I. Đợt III tổ trồng nốt 160 cây. Tính tổng số cây mà đội đó phải trồng.
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