
theorem Th751:
Sum digits(264,10) = 12
proof
  thus Sum digits(264,10) = Sum <%4,6%>+Sum <%2%> by Th750,AFINSQ_2:55
  .= (4 + 6) + Sum <%2%> by AFINSQ_2:54
  .= 10 + 2 by AFINSQ_2:53
  .= 12;
end;
