Solve vertical and horizontal computation problems
They're also available for nearly all grade levels. There are printable middle school, high school, elementary school, and even pre-school worksheets.
Subtract 1- or 2-digit number from a 2-digit number with/without renaming
These students have weak immediacy. This means that compared to other students, they are slow to come up with the right answers to basic math problems like 6 x 8, or 35 divided by 7. While other kids have the answer stored in their memory, these kids do not. This causes big problems when they try to work through the more complex problems they encounter in junior high math.