When we first began our homeschooling journey, after a period of unschooling, Miss 14 (then Miss 13) began math by re-learning her times tables. We used math salamanders. After a few weeks of times tables we moved onto long addition and subtraction, then multiplication. We used free worksheets from ezy math tutoring.
Once she regained her math confidence we began using mathsonline. Miss 12 is now using it too.
Although Miss 12 is still using mathsonline, Miss 14 is between math programs. Most likely we will be going back to worksheets and making sure she remembers everything before moving on.
We also do a lot of game-schooling in our homeschool so I am always on the lookout for a good math game to include.