CK-12 Foundation
Ck 12: Elem Math: Common Multiples
[Free Registration/Login may be required to access all resource tools.] This site focuses on common multiples, a multiple of two or more numbers. It includes an interactive activity with a sports calendar and a practice quiz where...
CK-12 Foundation
Ck 12: Arithmetic: Common Multiples
[Free Registration/Login may be required to access all resource tools.] Find the common multiples of given pairs of numbers.
Other
Help With Fractions: Finding the Least Common Multiple
This website gives an excellent explanation of how to find the least common multiple. It offers two different methods and gives easy to follow step by step directions.
Other
Help With Fractions: Least Common Denominator
The rules for finding the least common denominator are clearly explained at this website. Two different methods are given. This is an excellent place to get step by step explanations for working with fractions.
University of Cambridge
University of Cambridge: Nrich: Red Balloons, Blue Balloons
Use your problem solving skills to help Katie and Will solve the problem they have with blowing up their balloons until they pop. See if you can discover the solution on your own at this one page website. Then check the solution...