There are 6 boxes, and their weight is: ① 69 kg; ② 396 kg; ③ 165 kg; ④ 93 kg; ⑤ 273 kg; ⑥ 170 kg. How many times will it take to transport them away in a small truck that can only hold 450 kg? How did you get lucky?
有6只箱子，它们重量是：①号69千克；②号396千克；③号165千克；④号93千克；⑤号273千克；⑥号170千克．把它们用只能装450千克的小卡车运走，要运几次？你是怎样运的？
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