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Nguyễn Mỹ An
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2023-03-27 07:53:47
2023-03-27 07:53:47
2023-03-27 07:53:47
2022-11-05 18:53:14
Chỗ 4 + 2 có thể viết là : 6 lun nha
2022-11-05 18:49:57
4 giờ đầu xe đó chạy được là: 40 x 4 = 160 (km)
2 giờ sau xe đó chạy được là: 70 x 2 = 140 (km)
Trung bình mỗi giờ xe chạy được là: ( 160 + 140) : ( 4 + 2) = 50 (km)
Đ/S : 50 km