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Snutchy

Awesome things about you that most of us don't know about you.

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What do you mean by factoring it out. Can you give an example?

I will give a couple. Let's say I need to multiply 33 times 25. I would do 3 x 25 which is 75 and the 0 back to make it 750. I would then add the other 3 x 25 which is 75. 750 plus 75 is 825.

Another example. Multiply 44 times 18. I would do 44 times 20 first. First 44 x 2 for 88 and add the 0 to make it 880. Then I would take 2 x 44 off of that total. 880-88 equals 792.

I can do it some with division as well but it is much harder to explain. This can also be very useful in figuring percentages off on sales when shopping :-)

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What do you mean by factoring it out. Can you give an example?

I do something similar. Say you are multiplying 24 and 56.

By the Fundamental Theorem of Arithmetic, all non-prime numbers are a product of prime numbers.

24 = 2*2*2*3

56 = 2*2*2*7

24*56 = 2*2*2*2*2*2*3*7

So 24*56 = 12*112 = 6*224 = 3*448 = 2*672 = 8*168 = 4*336 = 21*64 = 1344

Or what I usually do in situations like this is (24*50) + (24*6) = 1200 + 144 = 1344. Which is a lot quicker and easier.

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I will give a couple. Let's say I need to multiply 33 times 25. I would do 3 x 25 which is 75 and the 0 back to make it 750. I would then add the other 3 x 25 which is 75. 750 plus 75 is 825.

Another example. Multiply 44 times 18. I would do 44 times 20 first. First 44 x 2 for 88 and add the 0 to make it 880. Then I would take 2 x 44 off of that total. 880-88 equals 792.

I can do it some with division as well but it is much harder to explain. This can also be very useful in figuring percentages off on sales when shopping :-)

Yeah, I do the same thing.

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I will give a couple. Let's say I need to multiply 33 times 25. I would do 3 x 25 which is 75 and the 0 back to make it 750. I would then add the other 3 x 25 which is 75. 750 plus 75 is 825.

Another example. Multiply 44 times 18. I would do 44 times 20 first. First 44 x 2 for 88 and add the 0 to make it 880. Then I would take 2 x 44 off of that total. 880-88 equals 792.

I can do it some with division as well but it is much harder to explain. This can also be very useful in figuring percentages off on sales when shopping :-)

That is "old math" which is actually easier for many basic problems, and often easier to do in your head. Whether they realize it or not, most people use "old math" when they are figuring what their change should be or approximating what their total bill will be. They started teaching "new math" in the late 1950's because it is faster and less prone to error as problems get more difficult/complex.

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I will give a couple. Let's say I need to multiply 33 times 25. I would do 3 x 25 which is 75 and the 0 back to make it 750. I would then add the other 3 x 25 which is 75. 750 plus 75 is 825.

Another example. Multiply 44 times 18. I would do 44 times 20 first. First 44 x 2 for 88 and add the 0 to make it 880. Then I would take 2 x 44 off of that total. 880-88 equals 792.

I can do it some with division as well but it is much harder to explain. This can also be very useful in figuring percentages off on sales when shopping :-)

Didn't know what you meant at first but that's how I do it. Easier to add the small number to the big number to me.

Basically left to right instead of right to left like on paper.

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That's funny, I can sing too.

"Your voice is like a combination of Fergie and Jesus"

Edited by weams

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I do something similar. Say you are multiplying 24 and 56.

By the Fundamental Theorem of Arithmetic, all non-prime numbers are a product of prime numbers.

24 = 2*2*2*3

56 = 2*2*2*7

24*56 = 2*2*2*2*2*2*3*7

So 24*56 = 12*112 = 6*224 = 3*448 = 2*672 = 8*168 = 4*336 = 21*64 = 1344

Or what I usually do in situations like this is (24*50) + (24*6) = 1200 + 144 = 1344. Which is a lot quicker and easier.

I am pretty darn good at multiplying any two digit number as well and can generally come up with the answer in less than 3 seconds. For me though, I just do 2 calculation. For example, with your 56*24 example, I would just d0:

56*20 = 1120 and then

56*4 = 224 and then just add the two in my head together.

1120+224 = 1344

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I can yodel Snutchy's name while driving past Purdue Stadium at 55 miles per hour.

LIES! Give yourself more credit than that! You were going at least 60 the last time I heard you!

"Sorry officer, I just came from the western shore, I thought the speed limit was 65 here like it is back home."

Suuuuuuuuuure Dip.

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LIES! Give yourself more credit than that! You were going at least 60 the last time I heard you!

"Sorry officer, I just came from the western shore, I thought the speed limit was 65 here like it is back home."

Suuuuuuuuuure Dip.

55, 60, 65?

Amateurs.

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I play 6 instruments and sing as well.

Also I played collegiate baseball at ECU (with Chad Tracy) but before the season started I ruptured my Achilles tendon for the second time and had to stop playing sports.

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