I agree that it sounds much like SM or MiF. I did do SM with my (not officially Dx) dysgraphic-y and math-y child, and found that having to do the same problem multiple ways was not that annoying--it was definitely writing that was the issue. I scribed through the first five grade levels worth of SM (which is all that most people do of the curriculum, anyway), and accepted oral explanations of word problems, with just the answer written down.
This is where scribing and supplementary oral assessment come in.
