A student is given a subtraction problem and he solves as provided below.
\(\begin{array}{*{20}{c}} {968}\\ -{ 499}\\ {\overline {531} } \end{array}\)
What can be concluded about his error?
1
He is a stupid student
2
He does not know subtraction.
3
He has misconception regarding arithematics
4
He has misconceptions regarding carry 1 in hand in subtractions.