Math Class

I surely agree on forgetting things. Being the smart (slightly egotistical) SOB that I am, I've tutored GED classes and the last one I did 4 years ago I found myself looking in the book to refresh myself. YUP, that's a real confidence builder for the folks your trying to help.:blush-33:
 
Here's another technique; mark out the length, then with dividers I tweak them till till I can get there in 3 steps. Then measure the distance between points. Or use the red neck calculator; take a strip of paper cut to the length you want to dive, then fold in thirds..
 
Here's what you do. You take a board 9 11/16", Write Hersheys Chocolate on it and toss it to 3 kids. I kid you not, there may be a black eye and a busted lip or so, BUT there WILL BE 3 equal parts!
 
Depends if they are related....
The oldest always got the bigger part, and moved smaller on down the line...
Unless the middle kid was fast runner. Then I would get the bigger part.
Chew and screw.....
 
Late to the party, but it depends on what you are using the result for.

As we know, keep the whole and fractional separate. So in this case 9 /3 = 3.

Now you have 11/16 Divide the 11 by 3 and you have 3 with 2/3 of a 16th left over. So we're at 3 3/16 with almost an entire 16th remaining - probably close enough to 1/4. If you need it more precise, measure it in 32nds. So 11/16 is 22/32. Divide 22 by 3 and you have 7/32 with 1/3 of a 32 left over. So it's 3 7/32. 64ths? 44/64, 44/3 = 14 with 2/3 of a 64th left over, so 3 15/64 would be pretty close. And so on.

Those are for if you're actually trying to measure something. For exact values you can convert to decimal as others have done, but unless you have a decimal measuring device you're going to have to convert back - right?
 
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  • #34
kweinert said:
Late to the party, but it depends on what you are using the result for.
Click to expand...

I guess I never said that did I?

I'm using it to cut octagons. I use 2 different methods to do it and one of them demands dividing the blank into thirds both ways and I don't like resawing blanks down to the easiest divisible dimension lol.
 
Oh, then why measure at all?

Just take your tape measure and put one end on one side and a number divisible by 3 on the other side (for your 9 11/16 blanks I'd use 12) crossing diagonally. Then just put a tick mark at 4 and 8 and you've divided the board into thirds.

Right?
 
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  • #36
kweinert said:
Oh, then why measure at all?

Just take your tape measure and put one end on one side and a number divisible by 3 on the other side (for your 9 11/16 blanks I'd use 12) crossing diagonally. Then just put a tick mark at 4 and 8 and you've divided the board into thirds.

Right?
Click to expand...

I can't picture stuff like that you got to show me. I can't see how 4 and 8 are thirds of 9 11/16.
 
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  • #38
I can't open it even when I save it.
 
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Okay I was able to open it, but it makes no sense at all to me. Your rule is not corner to corner nor along a side. It appears to just be thrown on top of the square randomly and the marks make no sense whatsoever to me. How are 3 & 6 equal divisibles of 9 11/16?
 
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Kevin said:
I can't picture stuff like that you got to show me. I can't see how 4 and 8 are thirds of 9 11/16.
Click to expand...
They aren't. They're thirds of 12.:nodice: Kweinert's suggestion is a great one! You're measuring on the angle - whatever angle it takes to make the length easily divisible by 3.
 
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