I am tutoring a Grade 2 girl in arithmetic. She has demonstrated an ability to add two-digit numbers with carrying. For example:
$$\;\;14\\ +27\\ =41$$
I asked her to write this out horizontally, and this is what she produced.
She evidently is failing to see the numbers and is confounding the vertical addition of the digits with the horizontal reading of the numbers.
With practice, and prompting, she is able to get this right, but it seems as though she sees the sum as a matrix of four digits, and is missing the numbers.
Any insights on how to help her?