Question

What could be the logic behind the following subtraction done by a child:3.45-4.6=1.39 Does this shows that the child has not understood the process of subtraction of numbers? Give reasons for your answer. How will you help her to correct her mistake.

Answer 1

The logic behind the following subtraction done by a child 3.45 - 4.6 = 1.39 is that the child doesn't understand negative numbers, because the result should be negative, and the child substracts decimal as a hundredth, so it doesn't understand fractions. So, this shows that the child has not understood the process of subtraction of fractions and operations with negative numbers.