ripple delaying wasn't that difficult to implement either - if the upper half adder can carry as fast as the lower, a simple delay can be added to the distribution of bits.
ohh ... yeay i think youre right ill retry it an now it works :D sorry man ;)
hmmm... I got 5+3=8. Probably just an accidental button push. It is a very small keypad.
nice work man ;) its fast and very accurate :) there is just one mistake,when i insert 5+3 i got 14 :/ maybe check the carry ins from each full adder to solve it :) i wanna see more ;) +1