#1




Tapeculator
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Drawing by Smartdraw 
#2




I always use my fingers for smaller numbers...
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Don't pick a fight with an old man. If he is too old to fight, he'll just kill you... John Steinbeck "If we ever forget that we're one nation under God, then we will be a nation gone under". ~Ronald Reagan We should have picked our own cotton... I love my women hot and my beer ice cold.. 
#3




And I always thought that "higher mathematics" was any thing that required me to take my shoes off... RED
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A 160 MPH drive, down a 2 lane blacktop, all by yourself, is NOT antisocial behaviour... I drag race because football, baseball, and golf only need ONE ball. Paul. What I really need to know is, WHEN DOES THE SHOOTING START? 
#4




Here's a little trick that I use and have taught in the apprenticeship math class that I teach, when trying to find half of a fraction. If you know how to do this it takes less time to do it by hand, than it does on the calulator.
Example: 123 11/16" First: Take the whole number and lower it the the next EVEN whole number. 122" Second: Divide that whole number in half. 61" Third: Double the denominator. (16x2= 32) Forth; Add the numerator and demominator together. (11+16= 27) Answer: 6127/32" 12311/16" 122" 61" 61 ?/32" 6127/32" On even whole numbers, just divide the whole number in half, double the denominator and just move the same numerator down to the doubled denominator. Example: 12211/16" 61" 61 ?/32" 6111/32" I've used this little trick for quite a few years, in the shop and field and it works faster than trying to do it on the calulator. In the classroom I'd give the students 8 seconds to figure this out on the calulator and by the time they had got them out of their pockets and turned them on, I'd already have the answer on the board. Just thought I'd pass this on, since most of us always are working with fractional numbers.
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Bill Retired welder/fitter of UA local #290, Portland, Oregon Miller Dialarc HFP Miller 251 wire feed/ with Alum. spool gun purchased from Wyoming (Roy) Thermal Dynamics 52 Plasma 7" x 12" Horiz. Bandsaw Weld Craft TIG Torches JD2 Model 3 hydraulic Tubing bender with quite a few expensive dies One Big Ass Mistake America Always remember ...... a government large enough to give you everything you want is also big enough to take everything you have. Last edited by Diverbill45; 01292007 at 01:20 AM. 
#5




Quote:
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The one that dies with the most tools wins If it's worth having, it's worth working for I carry a gun because I'm too young to die and too old to take an ass whoopin! 
#6




Bill, is it wrong that after that math class, my head hurts?
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If the women don't find you handsomethey should at least find you handy. Red Green 
#7




Take 715/16" divided by 1/2.
To get that number, you read 7, then 1/2, then 1/4, then 1/8, then 1/16, and added them together to get 715/16.To measure you must disassemble the whole mess and then read 7, then 1/2, then 1/4, then 1/8, then 1/16 and mark it on the stock. Read the ruler the "other" way R>L and you have 8  (minus) 1/16" Right every time.  To divide by say half, read the measurement but do not add it together, leave it as parts. 1/2 of 7 = 31/2 1/2 of 1/2 = 1/4 1/2 of 1/4 = 1/8 1/2 of 1/8 = 1/16 and 1/2 of 1/6 = 1/32 Read it directly on the ruler (no assembly and disassembly of numbers) and mark the stock. First time or two you use it, it only seems confusing, but all the adding and disassembling of the numbers is what is usually causing the confusion.  If possible always use the same measuring device to both measure and then to cut. All tape measures are not the same. Some of the cheap ones have markings that vary over their length. To check, fold the tape back upon itself and see if the markings on one portion of the tape match the markings on the second section.
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IForgeIron  click to go Tools do not make the blacksmith, the blacksmith makes the tools. gc 
#8




Naw Dirt, that's okay, don't worry about it. After each one of my math classes my head even hurts and I'm the d**n instructor.
Thank God we've progressed above and beyond the slide rule era. Now wasn't that a fun time, to be had, in math class.
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Bill Retired welder/fitter of UA local #290, Portland, Oregon Miller Dialarc HFP Miller 251 wire feed/ with Alum. spool gun purchased from Wyoming (Roy) Thermal Dynamics 52 Plasma 7" x 12" Horiz. Bandsaw Weld Craft TIG Torches JD2 Model 3 hydraulic Tubing bender with quite a few expensive dies One Big Ass Mistake America Always remember ...... a government large enough to give you everything you want is also big enough to take everything you have. 
#9




Since I Machine metal more than I butcher wood I work more with decimals. I don't get many requests to get it to 1/16"..
Although I have had some say, with their fingers spread apart, "about this long." I say "hold that while I get my tape measure" just before I ask if they can out run my .45... Patience my ***...
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Don't pick a fight with an old man. If he is too old to fight, he'll just kill you... John Steinbeck "If we ever forget that we're one nation under God, then we will be a nation gone under". ~Ronald Reagan We should have picked our own cotton... I love my women hot and my beer ice cold.. 
#10




IforgeIron, .......... I'll have to work with that one.
Basically, the reason I posted the info was that, on occasion, I've been asked to figure out what half of a large fractional number is and didn't have a tape or calculator with me, at the time, so I'd just used this method, and in about 2 to 4 seconds, I'd have the answer. There is a little 2 part trick involved and here's where it comes into play. Say someone asks you to figure out what half of 15715/32" is. It doesn't matter if it's a large or small number. As soon as they give you that number, you already have over half the problem worked out, because you know that you need to figure what half of 156 is, which is 78. (Always remember when given an ODD whole number, drop down to the next EVEN whole number.) Then the denominater, which in this case is 32, automatically doubles to 64. (Always double the denominator.) These first 2 steps are the whole trick. Then the only real math that has to be done is adding 15 and 32 together, which is 47. Answer: 7847/64". Now, where things will be a little different, is when given an even whole fractional number, say 13415/32". You'd have to figure out what half of 134 is, which would be 67. ALWAYS double the denominator, in either case. Then in this case, just move the same numerator (15), no adding needed, above 64. Answer: 6715/64" Your figure was 715/16". As soon as I read that I already knew that I was going to divide 6 not 7 in half, which is 3, 16 doubles to 32 and 15+16 is 31, answer: 331/32". I've used other methods, in the past, and when someone showed me this years ago, it just seemed to be the fastest way, for me, without having to have a calculator or a tape measure around, and believe me I'm no whiz when it comes to math. Good info, I always like to get new ideas and tricks from others, thanks for the tip.
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Bill Retired welder/fitter of UA local #290, Portland, Oregon Miller Dialarc HFP Miller 251 wire feed/ with Alum. spool gun purchased from Wyoming (Roy) Thermal Dynamics 52 Plasma 7" x 12" Horiz. Bandsaw Weld Craft TIG Torches JD2 Model 3 hydraulic Tubing bender with quite a few expensive dies One Big Ass Mistake America Always remember ...... a government large enough to give you everything you want is also big enough to take everything you have. 
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