While solving the addition problem 58 + 27, a child says, "I rounded 58 to 60 and 27 to 30. So, I changed the problem to 60 + 30. My answer is 90." What can be said about this child?
1
The child does not know how to solve addition problems.
2
The child is applying the concept of rounding incorrectly.
3
The child has conceptual understanding of addition and is using an alternate strategy.
4
The child has neither conceptual understanding nor the knowledge of standard algorithm of addition.