That sort of thing would drive me crazy. If your dc intuits (or knows) that 6x3=3x6, it seems wrong to me to mark it wrong. Mathematically, it isn't wrong.
No solutions here, just sympathy! From what I'm seeing in math textbooks, the CC emphasis on verbiage is sometimes producing ridiculous outcomes (like the 3x6 example) and, in addition, a lot of bizarre, unnecessary "experiential" learning that is supposed to obviate the need for logical thinking. My dc's once had to trace and cut out -- and I'm not kidding -- 50 tiny shapes (about 1/2 inch by 1 inch) and then paste them to make a tessellation. They were 14 at the time, not 5. It would have been far more useful to learn the actual MATH of tessellation.
