@InternetH0F I'd do maths (I feel) in the craziest way
So I'd do the 7+8 as a 7x2 is 14. Plus the 1 = 15
Then the 2 + 4 = 6 plus 1 = 70 plus the 5 = 75
Being 27 + 48 = 75
Sometimes I'd also think of it as
To get 27 to 30 it would be 3. So 48 - 3 = 45
Meaning 4 + 3 = 7 plus the 5 =75