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Common Core Math: Do you have the answer?

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  • #46
    Re: Common Core Math: Do you have the answer?

    Originally posted by Lutherf View Post
    After reading through the questions and the responses in this thread I now understand how we can have a federal budget deal that increases spending but is called a spending "cut".
    like i said in the other common core thread, it teaches word games and recognizing bullshit as much as it teaches math. That's a useful skill to have you know. Its how you avoid the quoted portion.

    מה מכילות החדשות?


    • #47
      Re: Common Core Math: Do you have the answer?

      Originally posted by reality View Post
      You're being asked whether she needs 4 or 6 bags to have a number that is evenly divisible. You tell me, you're the sorceror (math being witchcraft and sorcery)
      Read it again. Using english. "How many stickers could she buy so there are no leftover?"

      How many stickers in a bag, how many friends? Is it 3,5, 11, 22 friends? Are there 3,6,8,12, or 24 stickers per bag?
      The original question is incomplete. You get a different answer depending on number of friends and numbers of stickers. This is portion management we do it all the time but we need complete information to do it.

      מה מכילות החדשות?


      • #48
        Re: Common Core Math: Do you have the answer?

        Seriously people, L2math.

        I just happened to be solving trigonometric equations with coterminal angles. Infinitely many solutions, but only one correct answer.

        מה מכילות החדשות?


        • #49
          Re: Common Core Math: Do you have the answer?

          Originally posted by JDJarvis View Post
          Read it again. Using english. "How many stickers could she buy so there are no leftover?"

          How many stickers in a bag, how many friends? Is it 3,5, 11, 22 friends? Are there 3,6,8,12, or 24 stickers per bag?
          The original question is incomplete. You get a different answer depending on number of friends and numbers of stickers. This is portion management we do it all the time but we need complete information to do it.
          I'm gonna give a go at 'splaining this.

          The original question:

          Juanita wants to give bags of stickers to her friends. She wants to give the same number of stickers to each friend. She's not sure if she needs 4 bags or 6 bags of stickers. How many stickers could she buy so there are no stickers left over?
          She needs 4 or 6 bags. That means she has 1, 2, 3, 4 or 6 friends. (with 2 or 3 friends she gives each one 2 bags, with 4 or 6 friends each get one bag). 6 is the "worst case" so to speak, so we need at least 6 stickers.

          If you think about it, the amount of friends doesn't matter. What matters is we need to fill each bag with the same amount of stickers so we can distribute them evenly, without leftovers. Like stated, we have 4 or 6 bags.

          So what amount of stickers can we put in either 4 or 6 bags without leftovers? That's 12 stickers, or any positive multiple or 12. Thats the answer. This is because 4 and 6 are both factors of 12 (1, 2, and 3 are also factors of 12, so indeed every possible number of friends we established earlier can be given an equal amount of stickers).

          Mathematically we would say the solution is:

          x = 12*n

          where x is the amount of stickers, and n a positive integer.
          Last edited by erikvv; 12-13-2013, 03:40 PM.

          מה מכילות החדשות?


          • #50
            Re: Common Core Math: Do you have the answer?

            (a bit offtopic, but relevant since this is a political forum)

            12 is a nice number, because of its many factors. If I could shape the world to my ideal I would get rid of the decimal system and switch to dozenal.

            I will definately teach my kids to calculate in dozenal, and incidentally also binary and hexadecimal because it is beneficial for coding. This would logically be one of the consequences of the 416d65726963612043616e20436f646520 Act of 2013, also known as the America Can Code Act. It is easy to learn alternative-base arithmetic when you're young.

            מה מכילות החדשות?


            • #51
              Re: Common Core Math: Do you have the answer?

              Originally posted by erikvv View Post
              (a bit offtopic, but relevant since this is a political forum)

              12 is a nice number, because of its many factors. If I could shape the world to my ideal I would get rid of the decimal system and switch to dozenal.

              I will definately teach my kids to calculate in dozenal, and incidentally also binary and hexadecimal because it is beneficial for coding. This would logically be one of the consequences of the 416d65726963612043616e20436f646520 Act of 2013, also known as the America Can Code Act. It is easy to learn alternative-base arithmetic when you're young.
              You should also teach your children how to convert bases so they can translate the number system of the primitive lifeforms who speaketh decimal.

              מה מכילות החדשות?


              • #52
                Re: Common Core Math: Do you have the answer?

                Originally posted by erikvv View Post
                (a bit offtopic, but relevant since this is a political forum)

                12 is a nice number, because of its many factors. If I could shape the world to my ideal I would get rid of the decimal system and switch to dozenal.
                That's just gross.

                מה מכילות החדשות?


                • #53
                  Re: Common Core Math: Do you have the answer?

                  Originally posted by erikvv View Post
                  I'm gonna give a go at 'splaining this.

                  The original question:



                  She needs 4 or 6 bags. That means she has 1, 2, 3, 4 or 6 friends. (with 2 or 3 friends she gives each one 2 bags, with 4 or 6 friends each get one bag). 6 is the "worst case" so to speak, so we need at least 6 stickers.

                  If you think about it, the amount of friends doesn't matter. What matters is we need to fill each bag with the same amount of stickers so we can distribute them evenly, without leftovers. Like stated, we have 4 or 6 bags.

                  So what amount of stickers can we put in either 4 or 6 bags without leftovers? That's 12 stickers, or any positive multiple or 12. Thats the answer. This is because 4 and 6 are both factors of 12 (1, 2, and 3 are also factors of 12, so indeed every possible number of friends we established earlier can be given an equal amount of stickers).

                  Mathematically we would say the solution is:

                  x = 12*n

                  where x is the amount of stickers, and n a positive integer.
                  Here's the problem .. the answer is not multiple choice for this question, which means the number of potential answers is greater than 1 -- why? because the question is incomplete. one student could put 12, another 24 another 48. Who is right?

                  מה מכילות החדשות?


                  • #54
                    Re: Common Core Math: Do you have the answer?

                    Originally posted by erikvv View Post
                    I'm gonna give a go at 'splaining this.

                    The original question:



                    She needs 4 or 6 bags. That means she has 1, 2, 3, 4 or 6 friends. (with 2 or 3 friends she gives each one 2 bags, with 4 or 6 friends each get one bag). 6 is the "worst case" so to speak, so we need at least 6 stickers.

                    If you think about it, the amount of friends doesn't matter. What matters is we need to fill each bag with the same amount of stickers so we can distribute them evenly, without leftovers. Like stated, we have 4 or 6 bags.

                    So what amount of stickers can we put in either 4 or 6 bags without leftovers? That's 12 stickers, or any positive multiple or 12. Thats the answer. This is because 4 and 6 are both factors of 12 (1, 2, and 3 are also factors of 12, so indeed every possible number of friends we established earlier can be given an equal amount of stickers).

                    Mathematically we would say the solution is:

                    x = 12*n

                    where x is the amount of stickers, and n a positive integer.
                    there you go

                    (̅_̅_̅(̅(̅_̅_̅_̅_̅_̅̅()ڪ

                    Originally posted by erikvv View Post
                    (a bit offtopic, but relevant since this is a political forum)

                    12 is a nice number, because of its many factors. If I could shape the world to my ideal I would get rid of the decimal system and switch to dozenal.

                    I will definately teach my kids to calculate in dozenal, and incidentally also binary and hexadecimal because it is beneficial for coding. This would logically be one of the consequences of the 416d65726963612043616e20436f646520 Act of 2013, also known as the America Can Code Act. It is easy to learn alternative-base arithmetic when you're young.
                    He's a witch!

                    (̅_̅_̅(̅(̅_̅_̅_̅_̅_̅̅()ڪ

                    Originally posted by jotathought View Post
                    Here's the problem .. the answer is not multiple choice for this question, which means the number of potential answers is greater than 1 -- why? because the question is incomplete. one student could put 12, another 24 another 48. Who is right?
                    yes

                    מה מכילות החדשות?


                    • #55
                      Re: Common Core Math: Do you have the answer?

                      Originally posted by jotathought View Post
                      Here's the problem .. the answer is not multiple choice for this question, which means the number of potential answers is greater than 1 -- why? because the question is incomplete. one student could put 12, another 24 another 48. Who is right?
                      Technically all 3 are wrong. When solving equations, unless otherwise specified, it is widely accepted that an answer should include all possible values. If a student writes down just one or 2 values without ellipsis or "etc" he hasn't displayed enough understanding of the problem.

                      Note the student gets 2 lines under this question to put his/her answer, which is more than for any of the other questions.
                      Last edited by erikvv; 12-13-2013, 04:45 PM.

                      מה מכילות החדשות?


                      • #56
                        Re: Common Core Math: Do you have the answer?

                        Originally posted by erikvv View Post
                        I'm gonna give a go at 'splaining this.

                        The original question:



                        She needs 4 or 6 bags. That means she has 1, 2, 3, 4 or 6 friends. (with 2 or 3 friends she gives each one 2 bags, with 4 or 6 friends each get one bag). 6 is the "worst case" so to speak, so we need at least 6 stickers.

                        If you think about it, the amount of friends doesn't matter. What matters is we need to fill each bag with the same amount of stickers so we can distribute them evenly, without leftovers. Like stated, we have 4 or 6 bags.

                        So what amount of stickers can we put in either 4 or 6 bags without leftovers? That's 12 stickers, or any positive multiple or 12. Thats the answer. This is because 4 and 6 are both factors of 12 (1, 2, and 3 are also factors of 12, so indeed every possible number of friends we established earlier can be given an equal amount of stickers).

                        Mathematically we would say the solution is:

                        x = 12*n

                        where x is the amount of stickers, and n a positive integer.
                        Wow what complete and utter Bullshit. Juanita doesn't know if she has 4 or 6 friends? Read it again. Tell me how many stickers she needs to buy , not how many bags but "how many stickers" just like the question is asking.

                        מה מכילות החדשות?


                        • #57
                          Re: Common Core Math: Do you have the answer?

                          Originally posted by JDJarvis View Post
                          Wow what complete and utter Bullshit. Juanita doesn't know if she has 4 or 6 friends? Read it again.
                          It doesn't say she doesn't know. And I never claimed that. That information is just not available to us.


                          Tell me how many stickers she needs to buy , not how many bags but "how many stickers" just like the question is asking.
                          I guess I can re-quote myself. I even underlined the sentence aftwards so people would notice:

                          Originally posted by erikvv View Post
                          That's 12 stickers, or any positive multiple or 12. Thats the answer.

                          מה מכילות החדשות?


                          • #58
                            Re: Common Core Math: Do you have the answer?

                            Odd it wouldn't be 12 stickers is she had 5 friends... or 24 freinds, or 8, or 9.
                            The question is malformed and incompete. It can only be answered by someone making assumption not a reading of the question.

                            מה מכילות החדשות?


                            • #59
                              Re: Common Core Math: Do you have the answer?

                              Originally posted by erikvv View Post
                              Technically all 3 are wrong. When solving equations, unless otherwise specified, it is widely accepted that an answer should include all possible values. If a student writes down just one or 2 values without ellipsis or "etc" he hasn't displayed enough understanding of the problem.

                              Note the student gets 2 lines under this question to put his/her answer, which is more than for any of the other questions.
                              while I certainly did find that particular question inelegantly put, in general the questions of the exam seemed quite good to me, and I thought what was particularily interesting was that the students had to find the 'missing' information by looking at the wrong answers. These certainly as a whole seemed like questions that required quite complex thinking.
                              Of course I find it absolutely hilarious that the person who explained the answer crisply and succinctly is writing from Holland, a country that wiped the floor with the US (and I hate to admit it, France) on the recent PISA world student evaluation...

                              PS Erikv I just spent quite a few weeks in Friesland on a decorative painting project

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                              • #60
                                Re: Common Core Math: Do you have the answer?

                                I gave a call to someone I knew who used to work at Houghton Miffilin Harcourt (and still has contact with people there). She was shocked that question got through to a finished project. It would have to pass through at least 3 or 4 people, likely many more. Many questions are written by content houses so the question would normally have 2 or more people go over it before anyone from houghton miffilin got a look at it. So that question is a screw up in the eyes of a pro who has worked in educational publishing for over 30 years (who isn't keen on common core but is much kinder to it than I am).

                                A question like that can get a content house between $10.00 and $30.00 (usually towards the lower end) so they aren't huge money makers given the amount of work and revision typically put into them. Again my contact was shocked (and surprised) that question would be distributed for use.

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