Paul Dawkins
Paul's Online Notes: Limit Properties: Practice Page
Provides nine practice problems that review the properties of limits used in computing limits.
Alabama Learning Exchange
Alex: Measurement Mania
In this lesson learners will review the English and metric measurement systems and compute how much paint and carpet would be needed to redecorate their classroom.
Scholastic
Scholastic: Max's Math Adventures: Subtraction Square Dance
This site has a square dance rhyme with some fun subtraction practice. Teachers will appreciate the activity page, the extra challenges, and the teacher's guide for easy lesson planning.
Other
Project Happy Child: Free Subtraction Worksheets
2000 basic subtraction worksheets are available at this web site. They can be printed and used for a variety of practice purposes. Some helpful hints are included to avoid mindless practice that could quickly become counter productive.