The way i understand algebra is brackets first, then multiplication/division, then add/subtract.
But if no brackets, still do multiplicatiin/division first...
Having said that...i think i got the answer wrong first time...
Having said that, your kid should not be confused, nor should ge be feeling confused, because the way i see it is the teacher should be teaching him...
There are patterns to everything...a systematic approach if you prefer...thats how we learn our times tables with repetitive rythmic poetry...and there's-look right-left-then right again to cross the road...
Just like us checking a chamber for safe & empty...
If you're taught correctly, or teach yourself correctly, these patterns become second nature to pretty much all people who dont have a real time learning difficulty.
An intuitive teacher should understand this & can find these 'patterns' & teach kids, not just dictate when they're wrong without an understanding explanation...
In any case...mathmatics has been taught for a long time now...proven systematic approaches would be well documented, so if your lad hates maths ( & doesnt have a severe learning difficulty), that teacher needs to have his methods evaluated...!!
The man who knows everything, doesnt really know everything...he's just stopped learning...