This worksheet set includes a math notebook/explanation of strategy page as well as 5 sheets of problems (10 questions total). Students are asked to find the prime factors of two numbers, then place those into a venn diagram. That venn diagram will give them the information in a quick way to find the LCM and GCF.
There are detailed answer keys provided and a detailed explanation of how to use the strategy in the document.
STUDENTS REALLY LOVE THIS METHOD and it is never fail.