5-5/1+8*7/7*8-4+4(9^(18-5))=?

135

Replies

  • sullus
    sullus Posts: 2,839 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    I am guessing you are early 40s/late 30s? There was a brief time where the order of operations was taught improperly in many areas.

    The standing rule is PEDMAS Left to right, and the intent must be explicit brackets and parenthesis.

    True, but the / isn't really a mathematical symbol .. so it's still open to interpretation.

    This is one of those problems where different brands of calculators will give you different answers, depending on how they interpret /
  • MireyGal76
    MireyGal76 Posts: 7,334 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    in this instance you go from left to right.(( 8*7) / 7)* 8

    if you have multiplication and division you go from left to right... same with addition and subtraction.

    Generally true, but the / symbol is mathematically ambiguous:
    Similarly, there can be ambiguity in the use of the slash ('/') symbol... For example, the manuscript submission instructions for the Physical Review journals state that multiplication is of higher precedence than division with a slash. (source "Physical Review Style and Notation Guide". American Physical Society. Section IV–E–2. Retrieved 5 August 2012.)

    well, I love you if you are right, because if you are, then it means I'm not stupid and don't have to rely entirely on my looks to get by. :flowerforyou:
  • vtmoon
    vtmoon Posts: 3,436 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    It's arithmetic there is no interpretation only followed rules.
  • whierd
    whierd Posts: 14,025 Member
    I am actually surprised that no one treated it as:

    5-5/1+8*7
    ____________
    7*8-4+4(9^(18-5))

    And came up with

    56
    ___
    10,167,463,313,368
  • sullus
    sullus Posts: 2,839 Member
    I am actually surprised that no one treated it as:

    5-5/1+8*7
    ____________
    7*8-4+4(9^(18-5))

    And came up with

    56
    ___
    10,167,463,313,368

    Also valid. There are interpretations and implementations that say divide everything to the left of the slash by everything to the right of the slash.
  • sullus
    sullus Posts: 2,839 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    It's arithmetic there is no interpretation only followed rules.

    / isn't an arithmetic symbol. it's a representation of either a division sign or a fraction on computers.

    ETA: There is no Peter, only Zuul.
  • snowblind50999
    snowblind50999 Posts: 8 Member
    =5-5/1+8*7/7*8-4+4(9^(18-5))

    =5-5+56/56-4+4(9^13)

    =0+1-4+4(2541865828329)

    =-3+10167463313316

    =10167463313313



    10,167,463,313,313


    maybe

    This^^
  • vtmoon
    vtmoon Posts: 3,436 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    I am guessing you are early 40s/late 30s? There was a brief time where the order of operations was taught improperly in many areas.

    The standing rule is PEDMAS Left to right, and the intent must be explicit brackets and parenthesis.

    True, but the / isn't really a mathematical symbol .. so it's still open to interpretation.

    This is one of those problems where different brands of calculators will give you different answers, depending on how they interpret /

    This is not a calculator, this website is a computer based platform, so "/" will always mean division this isn't open for debate, it is an agreed upon standard.
  • kms1320
    kms1320 Posts: 599 Member
    mind = blown..

    there is no spoon
  • crista_b
    crista_b Posts: 1,192 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    It's arithmetic there is no interpretation only followed rules.

    / isn't an arithmetic symbol. it's a representation of either a division sign or a fraction on computers.
    Technically a division sign and a fraction sign are the same. One-half = 1 divided by 2 = 50% = 0.5
  • kms1320
    kms1320 Posts: 599 Member
    The chances of randomly choosing the correct answer to this question is:

    a) 25%
    b) 50%
    c) 33%
    d) 25%
  • sullus
    sullus Posts: 2,839 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    I am guessing you are early 40s/late 30s? There was a brief time where the order of operations was taught improperly in many areas.

    The standing rule is PEDMAS Left to right, and the intent must be explicit brackets and parenthesis.

    True, but the / isn't really a mathematical symbol .. so it's still open to interpretation.

    This is one of those problems where different brands of calculators will give you different answers, depending on how they interpret /

    This is not a calculator, this website is a computer based platform, so "/" will always mean division this isn't open for debate, it is an agreed upon standard.

    Or ... as I posted previously ..

    Similarly, there can be ambiguity in the use of the slash ('/') symbol... For example, the manuscript submission instructions for the Physical Review journals state that multiplication is of higher precedence than division with a slash. (source "Physical Review Style and Notation Guide". American Physical Society. Section IV–E–2. Retrieved 5 August 2012.)

    It absolutely is open to debate.
  • crista_b
    crista_b Posts: 1,192 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    I am guessing you are early 40s/late 30s? There was a brief time where the order of operations was taught improperly in many areas.

    The standing rule is PEDMAS Left to right, and the intent must be explicit brackets and parenthesis.

    True, but the / isn't really a mathematical symbol .. so it's still open to interpretation.

    This is one of those problems where different brands of calculators will give you different answers, depending on how they interpret /

    This is not a calculator, this website is a computer based platform, so "/" will always mean division this isn't open for debate, it is an agreed upon standard.

    Or ... as I posted previously ..

    Similarly, there can be ambiguity in the use of the slash ('/') symbol... For example, the manuscript submission instructions for the Physical Review journals state that multiplication is of higher precedence than division with a slash. (source "Physical Review Style and Notation Guide". American Physical Society. Section IV–E–2. Retrieved 5 August 2012.)

    It absolutely is open to debate.
    Isn't that just explaining that the order of PEMDAS puts the M before the D?





    (before the D :wink: :laugh: )
  • FunkyTobias
    FunkyTobias Posts: 1,776 Member
    In other news:

    40-32/2=4!
  • atb0821
    atb0821 Posts: 458 Member
    Purple?
  • vtmoon
    vtmoon Posts: 3,436 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    It's arithmetic there is no interpretation only followed rules.

    / isn't an arithmetic symbol. it's a representation of either a division sign or a fraction on computers.

    ETA: There is no Peter, only Zuul.

    I mean I can go to France and demand that the police speak to me in Chinese but that would not make sense. We are on computers so we speak that language :tongue:

    Also, the Gatekeeper was nice for speaking English and not the demon language, because they possessed an English speaking host. Which is like speaking calculator while possessing a computer.
  • sullus
    sullus Posts: 2,839 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    I am guessing you are early 40s/late 30s? There was a brief time where the order of operations was taught improperly in many areas.

    The standing rule is PEDMAS Left to right, and the intent must be explicit brackets and parenthesis.

    True, but the / isn't really a mathematical symbol .. so it's still open to interpretation.

    This is one of those problems where different brands of calculators will give you different answers, depending on how they interpret /

    This is not a calculator, this website is a computer based platform, so "/" will always mean division this isn't open for debate, it is an agreed upon standard.

    Or ... as I posted previously ..

    Similarly, there can be ambiguity in the use of the slash ('/') symbol... For example, the manuscript submission instructions for the Physical Review journals state that multiplication is of higher precedence than division with a slash. (source "Physical Review Style and Notation Guide". American Physical Society. Section IV–E–2. Retrieved 5 August 2012.)

    It absolutely is open to debate.
    Isn't that just explaining that the order of PEMDAS puts the M before the D?





    (before the D :wink: :laugh: )

    Depends on the interpretation of the order of operations too. Multiplication, THEN division .. or multiplication and division in a straight line from left to right.
  • vtmoon
    vtmoon Posts: 3,436 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    I am guessing you are early 40s/late 30s? There was a brief time where the order of operations was taught improperly in many areas.

    The standing rule is PEDMAS Left to right, and the intent must be explicit brackets and parenthesis.

    True, but the / isn't really a mathematical symbol .. so it's still open to interpretation.

    This is one of those problems where different brands of calculators will give you different answers, depending on how they interpret /

    This is not a calculator, this website is a computer based platform, so "/" will always mean division this isn't open for debate, it is an agreed upon standard.

    Or ... as I posted previously ..

    Similarly, there can be ambiguity in the use of the slash ('/') symbol... For example, the manuscript submission instructions for the Physical Review journals state that multiplication is of higher precedence than division with a slash. (source "Physical Review Style and Notation Guide". American Physical Society. Section IV–E–2. Retrieved 5 August 2012.)

    It absolutely is open to debate.

    I mean some scientists still day the world is 6000 years old with our understanding of time. So they can technically debate that fact.
  • R_Calvillo
    R_Calvillo Posts: 177 Member
    I thought the answer to everything is 42.
  • crista_b
    crista_b Posts: 1,192 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    I am guessing you are early 40s/late 30s? There was a brief time where the order of operations was taught improperly in many areas.

    The standing rule is PEDMAS Left to right, and the intent must be explicit brackets and parenthesis.

    True, but the / isn't really a mathematical symbol .. so it's still open to interpretation.

    This is one of those problems where different brands of calculators will give you different answers, depending on how they interpret /

    This is not a calculator, this website is a computer based platform, so "/" will always mean division this isn't open for debate, it is an agreed upon standard.

    Or ... as I posted previously ..

    Similarly, there can be ambiguity in the use of the slash ('/') symbol... For example, the manuscript submission instructions for the Physical Review journals state that multiplication is of higher precedence than division with a slash. (source "Physical Review Style and Notation Guide". American Physical Society. Section IV–E–2. Retrieved 5 August 2012.)

    It absolutely is open to debate.
    Isn't that just explaining that the order of PEMDAS puts the M before the D?





    (before the D :wink: :laugh: )

    Depends on the interpretation of the order of operations too. Multiplication, THEN division .. or multiplication and division in a straight line from left to right.
    Well following order of operations, i.e., PEMDAS, parentheses outrank exponents, which outrank multiplication and division (but multiplication and division are at the same rank), and these two outrank addition and subtraction (which are together on the bottom rank). When you have a bunch of operations of the same rank, you just operate from left to right.

    Therefore it follows that you would operate the middle as ((8*7)/7)*8
  • SDkitty
    SDkitty Posts: 446 Member
    51344_zpsdb7bff0b.jpg

    :flowerforyou: :laugh:
  • vtmoon
    vtmoon Posts: 3,436 Member
    10,167,463,313,313
    10,167,463,313,376

    Are actually both correct.

    8*7/7*8 can be correctly interpreted as both 64 and 1. Just depends on if you consider it an in-line division symbol or 8*7 OVER 7*8

    I am guessing you are early 40s/late 30s? There was a brief time where the order of operations was taught improperly in many areas.

    The standing rule is PEDMAS Left to right, and the intent must be explicit brackets and parenthesis.

    True, but the / isn't really a mathematical symbol .. so it's still open to interpretation.

    This is one of those problems where different brands of calculators will give you different answers, depending on how they interpret /

    This is not a calculator, this website is a computer based platform, so "/" will always mean division this isn't open for debate, it is an agreed upon standard.

    Or ... as I posted previously ..

    Similarly, there can be ambiguity in the use of the slash ('/') symbol... For example, the manuscript submission instructions for the Physical Review journals state that multiplication is of higher precedence than division with a slash. (source "Physical Review Style and Notation Guide". American Physical Society. Section IV–E–2. Retrieved 5 August 2012.)

    It absolutely is open to debate.
    Isn't that just explaining that the order of PEMDAS puts the M before the D?





    (before the D :wink: :laugh: )

    Depends on the interpretation of the order of operations too. Multiplication, THEN division .. or multiplication and division in a straight line from left to right.

    AND not THEN is the rule. Left to right.
  • sullus
    sullus Posts: 2,839 Member
    AND not THEN is the rule. Left to right.

    True.

    Used to be that implied multiplication (ie. 2x) had higher precedence, but that's changing now too. Nowadays 2x/2x=x^2, when it used to = 1

    2 * x / 2 * x

    = (2x) / 2 * x
    = x * x
  • xinit0
    xinit0 Posts: 310 Member
    As any math instructor would tell you - "screw you and your order of operations - USE BRACKETS"
  • Morninglory81
    Morninglory81 Posts: 1,190 Member
    10167463313372!

    Done:tongue:
  • crista_b
    crista_b Posts: 1,192 Member
    AND not THEN is the rule. Left to right.

    True.

    Used to be that implied multiplication (ie. 2x) had higher precedence, but that's changing now too. Nowadays 2x/2x=x^2, when it used to = 1

    2 * x / 2 * x

    = (2x) / 2 * x
    = x * x

    This wasn't making sense. Then i see the problem 2x = x + x.

    (x + x) / (x + x) = 1
    Edited for derp.
  • sullus
    sullus Posts: 2,839 Member
    AND not THEN is the rule. Left to right.

    True.

    Used to be that implied multiplication (ie. 2x) had higher precedence, but that's changing now too. Nowadays 2x/2x=x^2, when it used to = 1

    2 * x / 2 * x

    = (2x) / 2 * x
    = x * x

    This wasn't making sense. Then i see the problem 2x = x + x.

    (x + x) / (x + x) = 1
    I don't see 2x as being 2*x because there's no parentheses around the x or a multiplication symbol between them so 2x/2x =/= x^2 because 2x = x + x
    2x =/= 2*x

    Wolfram Alpha changed in early 2013 to treat implied multiplication the same as explicit multiplication (formerly, implied multiplication without parentheses was assumed to bind stronger than explicit multiplication). 2x/2x, 2*x/2*x, and 2(x)/2(x) now all yield x^2. The TI 89 and TI 86 calculators also yield x^2 in all three cases.
  • diodelcibo
    diodelcibo Posts: 2,564 Member
    But who was clear notation?
  • crista_b
    crista_b Posts: 1,192 Member
    AND not THEN is the rule. Left to right.

    True.

    Used to be that implied multiplication (ie. 2x) had higher precedence, but that's changing now too. Nowadays 2x/2x=x^2, when it used to = 1

    2 * x / 2 * x

    = (2x) / 2 * x
    = x * x

    This wasn't making sense. Then i see the problem 2x = x + x.

    (x + x) / (x + x) = 1
    I don't see 2x as being 2*x because there's no parentheses around the x or a multiplication symbol between them so 2x/2x =/= x^2 because 2x = x + x
    2x =/= 2*x

    Wolfram Alpha changed in early 2013 to treat implied multiplication the same as explicit multiplication (formerly, implied multiplication without parentheses was assumed to bind stronger than explicit multiplication). 2x/2x, 2*x/2*x, and 2(x)/2(x) now all yield x^2. The TI 89 and TI 86 calculators also yield x^2 in all three cases.
    I'm not saying you're wrong. I just don't understand how 2x can be implied to be multiplication. I just can't wrap my own brain around it. That's like me saying, "Here's 2 3s," and someone trying to say that equals 9 because by having 2 3s, I imply that they should be multiplied. Personally, I just don't get it. :ohwell:
  • whierd
    whierd Posts: 14,025 Member
    My care levels have normalized.