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Do I use GCF or LCM?

Key words to look for in story problems to decide which strategy, GCF or LCM, will help you find the correct answer.
by Jamie Hill on 6 June 2011

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Transcript of Do I use GCF or LCM?

GCF
or
LCM? How to decide which
strategy to use to solve
a story problem. First, read the problem and
watch for some key words These words tell you to find the GCF arrangement
break
greatest
most
biggest If a problem
asks you to: split something
into smaller parts find how many
people to invite arrange something
into rows or groups Find the
GCF Find the
GCF Find the
GCF LCM least
smallest
time buy or get multiple things find something that happens at the same time find an event that repeats over and over find the
LCM
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