He doesn't know algebra? You multiply and divide first.
1) 5+5 × 5+5 =
2) 5+(5x5) + 5 =
3) 5+ 25 + 5 =
4) 35
I assume it's a troll because most people make the mistake of going left to right, not prioritizing addition
In that case it would look like this
1) 5+5 × 5+5 =
2) ((5+5)x5)+5 =
3) (10x5)+5 =
4) 50+5 =
55