MID("10X98765432",MOD(MID(A2,1,1)*7+MID(A2,2,1)*9+MID(A2,3,1)*10+MID(A2,4,1)*5+ MID(A2,5,1)*8+MID(A2,6,1)*4+1*2+9*1+MID(A2,7,1)*6+ MID(A2,8,1)*3+MID(A2,9,1)*7+MID(A2,10,1)*9+MID(A2,11,1)*10+MID(A2,12,1)*5+ MID(A2,13,1)*8+MID(A2,14,1)*4+MID(A2,15,1)*2,11)+1,1),"错误的身份证号码")) ```