
theorem Th795:
Sum digits(902,10) = 11
proof
  thus Sum digits(902,10) = Sum <%2,0%>+Sum <%9%> by Th794,AFINSQ_2:55
  .= (2 + 0) + Sum <%9%> by AFINSQ_2:54
  .= 2 + 9 by AFINSQ_2:53
  .= 11;
end;
