Review subtraction of 2 numbers whose sums would be 18 or less
Or you can usually find textbooks and workbooks at the public library, where you can also copy any worksheets that you want to use.
Homeschool worksheets are a vital part of the student's homeschool experience. They allow the child to test his or her knowledge, and they offer them a practical application for their learning.
From a teacher's perspective our competition is tough. Passing out a handout of 30 problems that are all in a format of 534x25= is not as stimulating in the students' eyes as playing games such as Grand Theft Auto and Resident Evil.