abcteach
Abcteach: Division
[Free Registration/Login Required] "Practice makes perfect!" Learners improve their division skills by reviewing facts from one to twelve. Printable worksheets and links to related sites also available.
University of Cambridge
University of Cambridge: Nrich: Twenty Divided Into Six
On this one page website sharpen your logic and addition fact skills while working on this challenge. The solution is available to double check your solution.
Other
Ohio Department of Education: Fifth Grade Achievement Test (Practice Test) [Pdf]
Half-length practice test for the third grade OAT (Ohio Achievement Test). The test includes 17 multiple-choice and 3 open-response question dealing with topics such as measurement (unit conversion, time), geometry (volume, area), data...
Other
Scweb4free.com: Addition Balloons
Find the sum of the two red ballons among the green ballons in this concise addition game. Practice basic facts through 15. Answers checked instantaneously.