
theorem Th346:
Sum digits(760,10) = 13
proof
  thus Sum digits(760,10) = Sum <%0,6%>+Sum <%7%> by Th345,AFINSQ_2:55
  .= (0 + 6) + Sum <%7%> by AFINSQ_2:54
  .= 6 + 7 by AFINSQ_2:53
  .= 13;
end;
