7 - 4 + 6 x 0 + 1 = ?

Answer:  4

Logic: There are no brackets or exponents, so you do multiplications and divisions first, from left to right. 

7 - 4 + 6 x 0 + 1 = 7 - 4 + 0 + 1 = 7 - 4 + 1 (6 x 0 = 0) According to DMAS!

Then you do additions and subtractions, from left to right.

7 - 4 + 1 = 3 + 1 = 4