Mathematics · Pedagogy of Mathematics
While solving a subtraction problem, 63 – 29, a child says, 'I changed 29 into 30 and 63 into 64. So, I changed the problem to 64 – 30. My answer is 34.' What can be said about this child?
- 1The child has neither conceptual understanding nor the knowledge of the standard algorithm of subtraction.
- 2The child has a conceptual understanding of subtraction and hence uses an alternate strategy.✓
- 3The child is getting confused between addition and subtraction.
- 4The child does not know how to solve 63 – 29.
Correct answer
The child has a conceptual understanding of subtraction and hence uses an alternate strategy.
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