Math Trick: Find the GCF for 3 or More Numbers
Find the GCF, your teacher says … not just for 2 numbers, but for 5 of them.
And yes, you need to do it by prime factorizing.
Can’t you just hear the students’ groans?!
But what if there were a way to do this without prime factorizing? Could it really be?
What I’m about to teach you is a technique that lets you find the GCF of as many numbers as you wish, and with much greater ease than the old factoring technique. (by the way, I don’t really hate the factoring technique … it actually teaches you a lot about numbers … but it can get annoying!).
So why don’t they teach this new way in school? No idea. But let’s just focus on the technique because once you do, you’ll be so much faster at finding the GCF … you’ll be amazing your friends and your teacher, too!
So just kick back, watch the video — and learn …. then do the practice problems at the end of the video, to become a whiz! And remember, if you ever want extra help in the form of tutoring, I’m available — worldwide — thanks to the power of online videoconferencing.