123 例3.405 106 =1×0×6+2×5×(-1)+3×4×0-1×5×0-2×4×6-3×0×(-1) =-10-48=-58.结束 例 3 1 0 6 4 0 5 1 2 3 − =−10−48=−58 =106+25(−1)+340−150−246−30(−1)