
theorem Th361:
Sum digits(200,10) = 2
proof
  thus Sum digits(200,10) = Sum <%0,0%>+Sum <%2%> by Th360,AFINSQ_2:55
  .= (0 + 0) + Sum <%2%> by AFINSQ_2:54
  .= 2 by AFINSQ_2:53;
end;
