设甲数是x,则乙数是(8.18-x),丙数是(8.23-x)甲+乙+丙=x+(8.18-x)+(8.23-x)12.43=x+8.18-x+8.23-x12.43=16.5-x x=4.07乙=8.18-4.07=4.11丙=8.32-4.07=4.25
丙:12.43-8.18=4.25乙:12.43-8.32=4.11甲:12.43-4.25-4.11=4.07
甲4.02乙4.16丙4.30