A primary grade student solves a problem on subtraction in the following way: 301 − 30 = 331 (by writing 301 − 30 vertically and getting 331). Which of the following is the most appropriate reason for this type of error?

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Mathematics · Pedagogy of Mathematics

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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The student has over-generalized the concept of addition of zero to subtraction

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Answer 1

The student is careless and inattentive in the class

Answer 2

The student has over-generalized the concept of addition of zero to subtraction

Answer 3

The student does not know addition and hence is unable to do subtraction

Answer 4

The student has not practiced enough questions

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