CTET Class I to V 30 Jan 2023 Paper

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Question : 45 of 150

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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 ?

The child does not know how to solve 63 - 29
The child is getting confused with addition and subtraction
The child has conceptual understanding of subtraction and hence uses an alternate strategy
The child has neither conceptual understanding nor the knowledge of standard algorithm of subtraction

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