I agree, when kids can pass a 'mini test' they should not go through the grueling task of a pile of computations.
Grin, I'll keep it short and simple, I am dyslexic. I love working with these kids because believe me, I feel for them. I came up with ways to become proficient at math- after pitfalls and struggles, and of course no help back in the day. Each child is different, too. Generally I find they love finding my backwards numbers though.