Most young children have difficulty maintaining the level of neatness required for lengthy math problems, but it can be an ongoing concern for some children. Some students continue to make their numbers different sizes or incrementally shift numbers out of alignment. While this might not be a problem with two-digit calculations, it can start to cause confusion when they need to add up larger columns of numbers or do multiple steps. They might not re-consider the numbers and just perform the rote calculations never realizing that an "unaligned" number was used in the wrong column.