I've been helping ds1, aged 10, with some maths and verbal reasoning for the local secondary entrance tests.
It's becoming clear that he completely "gets" the questions, but loses marks for mistakes, and sometimes misreading graphs or charts.
This matches what his maths teacher said at parents' evening - but he usually gets 100% on mental maths.
When I watch him, the "silly mistakes" are him switching numbers, so 85 instead of 58 for eg. Usually if he's copying down a calculation. Or he'll get the right answer in the sum, but copy it down wrong.
I know that I do this too (my book keeper at work despairs), but I am wondering whether this is actually fairly common for his age, or are we missing something? His maths and literacy level at school are high, but his spelling, handwriting etc are not great.
He's frustrated, poor boy.