
theorem Th936:
Sum digits(184,10) = 13
proof
  thus Sum digits(184,10) = Sum <%4,8%>+Sum <%1%> by Th935,AFINSQ_2:55
  .= (4 + 8) + Sum <%1%> by AFINSQ_2:54
  .= 12 + 1 by AFINSQ_2:53
  .= 13;
end;
