How common is it for a child in year 5 to still need to count on fingers for basic sums (eg 7+5)? I'm trying to understand whether I'm dealing with a child who just isn't that good at maths or if it might be worth an assessment for discalculia. She struggles with arithmetic but seems to grasp concepts quickly - for example she can do long multiplication easily but will add it up wrong at the end or get 46 wrong. She's still struggling to grasp times tables as well and has to calculate even basic ones (eg 73).
We're a very mathematical family so I don't know what is 'normal'. However, I struggle with basic maths and have an A at further maths and DB is a mathematician who has been known to do x2 on a calculator. I don't know if it's just wishful thinking on my part though and I want to be fair in my expectations of her.