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  1. #81
    Zombie Slayer Aloha_Shooter's Avatar
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    Quote Originally Posted by MrPrena View Post
    2/3 = 0.666666666666666666666666666666666666666666666666 66666666666666666666666666666666666666666666666666 66666666666666666666666666666666666666666666666666 66666666666666666666666666666666666666666666666666 66666666666666666666666666666666666666666666666666 66666666666666666666666666666666666666666666666666 66666666666666666666666666666666666666666666666666 66666666666666666666666666666666666666666666666666 66666666666666666666666666666666666666666666666666 66666666666666666666666666666666666666666666666666 6666667


    Now take that extend it to the binary digital representation.

    2/3 = 1/2 + 1/8 + 1/32 + 1/128 + 1/512 + ...

    = 0.1010101 ...

    In actual single precision floating point, the 32 bits of a computer word are split using the first bit for the sign (positive or negative), 8 bits for the exponent, and 23 bits for the mantissa.

    You can see how this works at https://www.exploringbinary.com/floa...int-converter/ . Enter a decimal number, specify output in binary and click convert. Now for some real fun, specify decimal output as well and you can see what that binary representation really translates to. In the case of 2/3 at double precision, it's 0.666666666666666662965923241249478198587494439697 2656 .... that's generally "good enough for government work" but the errors pile up with each multiplication or division. A mechanical or electronical engineer (much less a general contractor) should never have to worry about that. Someone calculating the gravity boosts for an interplanetary probe using a radioactive thermal generator that needs to swing by the Earth a couple of times at altitudes of 1/20-1/10 the radius of the Earth does ...

  2. #82
    Machine Gunner RblDiver's Avatar
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    Quote Originally Posted by Aloha_Shooter View Post
    that's generally "good enough for government work" but the errors pile up with each multiplication or division. A mechanical or electronical engineer (much less a general contractor) should never have to worry about that. Someone calculating the gravity boosts for an interplanetary probe using a radioactive thermal generator that needs to swing by the Earth a couple of times at altitudes of 1/20-1/10 the radius of the Earth does ...
    https://www.youtube.com/watch?v=9z3JYb7VkFc
    2:37
    "An equation with a result of 1.33382 returns as 1.33381. This changes the results of all higher processes. We will reach different conclusions."
    "So the reason they worship the Reapers is...a math error?"

  3. #83
    Grand Master Know It All BladesNBarrels's Avatar
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    Genetic DNA evolution

    Aren't we all the result of math errors?

    Buying Randall Made Knives and Randall 1911 Pistols

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  4. #84
    Machine Gunner JohnnyDrama's Avatar
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    This is a fun thread. The discussion regarding fractions vs. decimals brought to mind a lecture in one of my calculus classes. The instructor commented that while "we" had math for a long time, when engineers started to use it, math was found to be too precise. They needed math that moved. So calculus was invented.

  5. #85
    Grand Master Know It All BladesNBarrels's Avatar
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    Had a flashback memory of the Hal and Charley Morning Radio Show on KHOW.
    They would play this every once in a while:

    Buying Randall Made Knives and Randall 1911 Pistols

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  6. #86
    Machine Gunner
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    Click image for larger version. 

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    My wife won't let me send this back to the school. It is my son's report card that I graded for them.

  7. #87
    Self Conscious About His "LOAD" 00tec's Avatar
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    Quote Originally Posted by encorehunter View Post
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    My wife won't let me send this back to the school. It is my son's report card that I graded for them.
    I would do it anyway. Totally worth it.

  8. #88
    Zombie Slayer MrPrena's Avatar
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    Quote Originally Posted by encorehunter View Post
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    My wife won't let me send this back to the school. It is my son's report card that I graded for them.
    If you have a friend who is principal or superintendent in same district, I would do it!


  9. #89
    Grand Master Know It All Duman's Avatar
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    That's too funny!

  10. #90
    Zombie Slayer MrPrena's Avatar
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    I ve heard that teachers has to take praxis and continuing education?



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