Mathematics · Pedagogy of Mathematics
When posed with a problem on subtraction, '400 - 45', a student responded: 'If it were 40, then the answer would be 360, but it is 45 so it is 355.' Which one of the following statements is correct for the strategy used by the student?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It is a hit and trial method of solving a problem.
- 2The student will get zero marks for using this strategy to solve a subtraction problem.
- 3It is an informal algorithm and reflects the student's mathematical thinking process.✓
- 4Only the standard algorithm is desirable for solving such problems, hence it is an incorrect method.
Correct answer
It is an informal algorithm and reflects the student's mathematical thinking process.
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