Incorrect, anon, the correct answer is indeed 41. In any expression or equation, you always follow the same steps, which have been put into a simple acronym.
B.E.D.M.A.S.
Brackets
Exponents
Division/Multiplication, These two are interchangeable.
Addition/ Subtraction. These two are also interchangeable.
This acronym is ALWAYS to be followed if one wishes to get the right answer.
In this case, 40+40 x 0+1, the multiplication, 40 x 0, would be done first, resulting in 0. Then we add it all up, 40+0+1, this, as you should know, will give you 41, the correct answer.