CTET PAPER I 2018 · PYQ · Subtraction / Misconceptions · medium
A child subtracted two numbers as shown below: 83 - 27 = 64. Which one of the following statements gives idea about the child's learning of subtraction?
A.The child has misconceptions about place value in the process of subtraction.✓ Correct
B.The child does not know how to subtract.
C.The child knows the process of subtraction of two-digit numbers.
D.It is a mistake and it can be rectified by repeated practice.
Explanation
The child has subtracted the smaller digit from the larger digit in each column regardless of position (7-3=4 in units, 8-2=6 in tens), showing a fundamental misconception about place value and the borrowing/regrouping process. The correct answer would be 56. This is not a careless mistake but reveals conceptual gaps in understanding place value during subtraction with regrouping.
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