Announcement

Collapse
No announcement yet.

hard in math

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • #31
    This is wierd.

    BEDMAS/BODMAS says division before multiplication.

    PEMDAS says multiplication before division.

    Personally, I've always used BODMAS and it's never been wrong.
    "The Director also sets the record straight on what would happen if oxygen masks were to drop from the ceiling: The passengers freak out with abandon, instead of continuing to chat amiably, as though lunch were being served, like they do on those in-flight safety videos."

    -- The LA Times, in a review of 'Flightplan'

    Comment


    • #32
      its like adding and subtraction, they are interchangeable. if you do 2+4-3, 6-3 is the same as 2+1. 3*10/5: 30/5, or 3*2
      ^----raveing lunatic


      please excuse my horendus mangeling of the english language, its only my first :P

      Comment


      • #33
        i never went wrong myself with BEDMAS

        Comment


        • #34
          Originally posted by schuyler
          its like adding and subtraction, they are interchangeable. if you do 2+4-3, 6-3 is the same as 2+1. 3*10/5: 30/5, or 3*2
          Not really.

          3/6*2 (by BEDMAS) = 1

          3/6*2 (by PEMDAS) = 1/4

          "The Director also sets the record straight on what would happen if oxygen masks were to drop from the ceiling: The passengers freak out with abandon, instead of continuing to chat amiably, as though lunch were being served, like they do on those in-flight safety videos."

          -- The LA Times, in a review of 'Flightplan'

          Comment


          • #35
            Originally posted by indian airlines
            Originally posted by schuyler
            its like adding and subtraction, they are interchangeable. if you do 2+4-3, 6-3 is the same as 2+1. 3*10/5: 30/5, or 3*2
            Not really.

            3/6*2 (by BEDMAS) = 1

            3/6*2 (by PEMDAS) = 1/4

            Actually, division and multiplication are to be done in the order as they appear in the equation.

            Therefore, in this question, 3 divided by 6, then times 2, would provide the correct answer, which is 1.

            Try it in a calculator. Type the question into it without any brackets, you should get 1.
            Will F.
            Photos: JetPhotos.Net | Airliners.net | General Photography

            Comment


            • #36
              calculators mess things up like that....
              ^----raveing lunatic


              please excuse my horendus mangeling of the english language, its only my first :P

              Comment


              • #37
                Originally posted by schuyler
                calculators mess things up like that....
                Trust me. The rule is that mulitplication and division are NOT interchangeable. They are done in the order as they appear from left to right.
                Will F.
                Photos: JetPhotos.Net | Airliners.net | General Photography

                Comment


                • #38
                  Originally posted by Crazy764
                  Originally posted by schuyler
                  calculators mess things up like that....
                  Trust me. The rule is that mulitplication and division are NOT interchangeable. They are done in the order as they appear from left to right.
                  Yeah, they are definitely not interchangeable. Not sure about the left-right thing though. I'm pretty sure it's always "first division, then multiplication".
                  "The Director also sets the record straight on what would happen if oxygen masks were to drop from the ceiling: The passengers freak out with abandon, instead of continuing to chat amiably, as though lunch were being served, like they do on those in-flight safety videos."

                  -- The LA Times, in a review of 'Flightplan'

                  Comment


                  • #39
                    No--it's definitely left to right. Not division first
                    let's say you have:
                    8/2*4*3*6/2
                    it equals 144 on my Ti-83
                    If you separate each step, it still equals 144


                    Just like addition and subtraction...left to right. (although that doesn't matter because it's commutative as long as you are adding negative numbers instead of subtracting positive numbers)

                    Comment


                    • #40
                      8+4/4*3/2

                      How about that?

                      I say the answer is 9.5 (by first doing the divisions, then the multiplication and finally the addition).

                      Going by your logic of left to right it should be 4.5

                      The TI-83 seems to think I'm right.
                      "The Director also sets the record straight on what would happen if oxygen masks were to drop from the ceiling: The passengers freak out with abandon, instead of continuing to chat amiably, as though lunch were being served, like they do on those in-flight safety videos."

                      -- The LA Times, in a review of 'Flightplan'

                      Comment


                      • #41
                        Originally posted by indian airlines
                        I'm pretty sure it's always "first division, then multiplication".
                        How did you pass highschool math Tanuj!

                        jk
                        Will F.
                        Photos: JetPhotos.Net | Airliners.net | General Photography

                        Comment


                        • #42
                          Check above Will.
                          "The Director also sets the record straight on what would happen if oxygen masks were to drop from the ceiling: The passengers freak out with abandon, instead of continuing to chat amiably, as though lunch were being served, like they do on those in-flight safety videos."

                          -- The LA Times, in a review of 'Flightplan'

                          Comment


                          • #43
                            Originally posted by indian airlines
                            8+4/4*3/2

                            How about that?

                            I say the answer is 9.5

                            Going by your logic it should be 4.5

                            The TI-83 seems to think I'm right.
                            4/4 = 1
                            1 x 3 = 3
                            3/2 = 3/2
                            8+3/2 = 19/2 = 9.5

                            Look at any math textbook...the order is:

                            1) Brackets
                            2) Exponents
                            3) Divison/Muliplication - As they appear from left to right
                            4) Addition/Subtraction - As they appear from left to right

                            I can't believe we are spending so long arguing a FACT!
                            Will F.
                            Photos: JetPhotos.Net | Airliners.net | General Photography

                            Comment


                            • #44
                              End of matter - Always use brackets!

                              Edit: and even though the left-right rule may be right, there is NO such instance where the "first division, then multiplication" rule doesn't work. Both of us are right.
                              "The Director also sets the record straight on what would happen if oxygen masks were to drop from the ceiling: The passengers freak out with abandon, instead of continuing to chat amiably, as though lunch were being served, like they do on those in-flight safety videos."

                              -- The LA Times, in a review of 'Flightplan'

                              Comment


                              • #45
                                in BEDMAN and PEDMAS its this, Divi or Multi, which ever comes first, Add or sub, which ever comes first, but you must follow the rule of bracets and exponents
                                -Kevin

                                Comment

                                Working...
                                X