Curious, why do you have to remember that 2 + 2 = 4 & 3 + 2 = 5? Once you know the values the symbols represent, at that point isn't it similar in simplicity to roman numerals?
II + II = IIII
2 + 2 = 4
Don't see how the latter problem lends itself to any more memorization beyond symbols
II + II = IIII
2 + 2 = 4
Don't see how the latter problem lends itself to any more memorization beyond symbols