
theorem Th755:
Sum digits(308,10) = 11
proof
  thus Sum digits(308,10) = Sum <%8,0%>+Sum <%3%> by Th754,AFINSQ_2:55
  .= (8 + 0) + Sum <%3%> by AFINSQ_2:54
  .= 8 + 3 by AFINSQ_2:53
  .= 11;
end;
