You can download these four math drills and assign them to your child if s/he needs extra practice. Simply click on the one of the drills to open it in your browser. You can then print it out for your child.
Allow the student five minutes to complete the drill. Repeat as necessary until s/he can finish the drill with zero errors in the time allotted. A student who has mastered the subject should be able to complete the drill in three minutes with no errors.