(-17)+9+(-2)+8+6+9+(-5)+(-1)+4+(-7)+(-8)=(-17)+(-2)+(-5)+(-1)+(-7)+(-8)+9+8+6+9+4=-40+36=-4收埋渣工时,在a地拍帆的南4千米。|-17|+|-17-9|+|9-(-2)|+|(-2)-8|+|8-6|+|6-9|+|9-(-5)|+|-5-(-1)|+|-1-4|+|4-(-7)|+|-7-(-8)|=17+26+7+10+2+3+14+4+5+11+1=100千米耗油弯贺悄100A升