Fun Fast Multiplication Trick!
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Uploader Comments (patrickJMT)
Top Comments
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...............I thought that was the way everyone multiplied them....
4 months ago 24
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Non-calculator tests are no match for me any longer!
2 months ago 4
All Comments (285)
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When will you show the quick way?
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thats called a grid method I did that in school
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Wow!!!! I never knew. Wow. Thank you, Patrick!!!!
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@patrickJMT Yeah, I suppose as long as i'm enjoying what I'm doing, then it's not work in the typical sense. I'm taking a few meaty classes right now, with not so great teachers, and it feels a little overwhelming some times. Anyways, thanks for the reply, and I just wanna say you remind me of my Algebra 2 teacher - the best teacher I've ever had!
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Put more
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gosh you are really amazing , i just love the trick
i was able to solve the exact value 123.6745342 X 12456.452312 in 3 seconds
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Hey patrickJMT, I just started classes for my major, and my teacher for calculus is so disappointing. I love algebra, and I love the material I'm learning, but I'm working my butt off trying to make up for the incompetence of my teacher. I'm just afraid I'm gonna burnout further down the road like others have. Did you ever feel like this? Can you give me any advice?
Jawbreaker2237 1 week ago
@Jawbreaker2237 well, you are going to have better and worse teachers; nothing you can do about that. if you are interested in a subject, a 'not great' teacher you have should not diminish that; you may just have to work a bit harder on your own. every student every where has to deal with this. : ) i mean, you gonna let one lousy teacher be enough to make you ' throw in the towel ' on a subject? : ) not me!
patrickJMT 1 week ago
Does it only work for 2 digit numbers?
uabm 1 week ago
@uabm it works for larger numbers, it would get a bit more complicated though
patrickJMT 1 week ago
i understand steps 1 and 3 and why that would work. but can you explain why step 2 works when you cross multiply? I love this trick, way fast! I would love to teach this strategy with some of my students, but I want to be able to explain why we do step 2 and how it works. Please help.
sjnegley0526 1 month ago
@sjnegley0526 well, if you are a teacher i think you should be able to figure it out. it is not anything deep : )
patrickJMT 1 month ago 3