
theorem Th330:
Sum digits(608,10) = 14
proof
  thus Sum digits(608,10) = Sum <%8,0%>+Sum <%6%> by Th329,AFINSQ_2:55
  .= (8 + 0) + Sum <%6%> by AFINSQ_2:54
  .= 8 + 6 by AFINSQ_2:53
  .= 14;
end;
