CTET Paper 1 · Mathematics-CTET

A student has solved the problem on subtraction in the following way: 604 - 86 524 Choose the most apropriate option in the light of solution given by the student:

  1. The student has extended the algorithm of addition to subtraction.
  2. The student has regrouped both the places of tens and ones as ‘10’.
  3. The student does not know how to do subtraction of two numbers.
  4. The student has done a careless mistake.
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