计算行列式的值
|4427327|
|5543443|
|7721621|
【正确答案】：|4 427 327| |5 543 443| |7 721 621| = |4 100 327| |5 100 443| |7 100 621| =100× |4 1 327| |5 1 443| |7 1 621| =100× |4 1 327| |1 0 116| |3 0 294| =-100 |1 116| |3 294| =-100×(294-3×116) =-100×(-54)=5400
