On a practical level, many parents of children with a similar profile have found success with Times Tales, using narrative mnemonics for multiplication facts. There is a somewhat similar product on their website for addition and subtraction: http://www.timestales.com/TwoPlusTwo.html

I haven't tried it, but it appears to be inexpensive enough to give it a try.

There are also resources like the Times Alive videos and equivalent addition product at City Creek Press: https://www.citycreek.com.

Last edited by aeh; 03/27/17 05:17 AM.
...pronounced like the long vowel and first letter of the alphabet...