This activity will give children plenty of practice in figuring out the lowest common multiple of two numbers. This will be practice where they need to think fast and eventaully get to the point where they can memorize what thei LCM of certain numbers are. Can be used in 5th grade and high level 4th.
COmmon Denominatior War is a great way for studetns to learn their fractions and divison problems. Adaptations: Use small numbers to start with. Extensions: Work with bigger numbers for students who are capable of doing so. Standard:5.2.3 Use models to show an understanding of multiplication and division of fractions.