Does 3.006and 3.060 are equivalent

Well, darling, technically speaking, 3.006 and 3.060 are not equivalent. You see, the extra zero in 3.006 may seem insignificant, but it actually represents a difference of ten times the value of the last digit. So, in the grand scheme of things, they are not the same. But hey, at least you're paying attention to those pesky decimal places!