>>53925939How tragic.
>didn't know what fractions or decimals wereThat's extremely basic. Pretty sure you learn about this shit in second grade. He's 10 and on (endless) summer break so he'd probably fresh out of fourth grade. Not to say he'd be great at math, Ash doesn't have patience or a mind for things beyond working with monsters, but he should at least be familiar with most of the things you said by the end of fourth grade going into fifth.
OP, do you think he NEVER went to school in Pallet?? We do know he can read and write, you know, so to say he's Kid Goku levels of uneducated seems highly unlikely.