Just looked at paper 10 and DD left out the questions you mentioned about number of people sitting at a table. Also the ordering of numbers is more complicated as it involves ordering numbers up to 3 decimal places.
These are both topics we haven't covered so to be honest I explained it quickly but moved on even though DD didn't grasp it fully. Didn't give DD a score for that paper on the basis that there were too many topics we hadn't covered. (Perhaps I'm in denial!
I do think the value of bond at the moment is to highlight what DD doesn't know, and to practise other topics so she doesn't forget these whilst learning new topics. In the mean time we are trying to tackle ratio - albeit very slowly as there just isn't enough time after school.
If I know DD hasn't done well on a paper - there's no score, I don't even add up the marks. But if she has done well (ie topics we have covered) then I do add up the results. I know it's very selective marking but it works for DD at the moment. I will have to be a bit stricter on marking later but only when I know she 'can' do the work.