zoo_keeper Posted December 1, 2011 Share Posted December 1, 2011 Ok, I know the math works out on this problem (at least what the operations they want us to perform) but it's completely non-sensical... "Four oranges and two bananas weigh 305 g altogether. Three oranges and two bananas weigh 215 g altogether. How much do two oranges weigh altogether?" So, of course, they want us to make a bar diagram like so... [O][O][O][O]=305g [O][O][O] =215g in which case it should be obvious that 1 orange weighs and thus 2 oranges weight 2*90=180g. Fine. And this is the answer in the book. But do you see the problem? Oranges can NOT weigh 90 g unless bananas have a negative weight!!! 4 90 g oranges would weight 360 g by themselves and 3 90 g oranges would weigh 270 g by itself! So SM messed up and should have printed different totals. Does anyone have a list of compiled SM errata? I used to have a bookmarked website, but the site has been taken down. Thanks! Quote Link to comment Share on other sites More sharing options...
zoo_keeper Posted December 1, 2011 Author Share Posted December 1, 2011 Bumping to see if anyone has a link to SM errata? Quote Link to comment Share on other sites More sharing options...
boscopup Posted December 1, 2011 Share Posted December 1, 2011 Is the problem worked in the back? (my CWP2 is upstairs in a box right now, or I'd look myself) Maybe you can figure out what numbers it should be. You can also post on the Singapore Math forums. Quote Link to comment Share on other sites More sharing options...
zoo_keeper Posted December 1, 2011 Author Share Posted December 1, 2011 Nope, it just says 2 oranges would weigh 180g. Thanks for the link, I'll look over in the forums for a listing! Quote Link to comment Share on other sites More sharing options...
Dana Posted December 1, 2011 Share Posted December 1, 2011 If it's the old CWP, the errata for them are down. From the main page of singaporemath, errata is at the bottom of the page: direct link. Definitely check at their forums. I've also gotten good responses from Jenny. And yup... nasty to get negatives :) Quote Link to comment Share on other sites More sharing options...
NoPlaceLikeHome Posted December 2, 2011 Share Posted December 2, 2011 If it's the old CWP, the errata for them are down.From the main page of singaporemath, errata is at the bottom of the page: direct link. Definitely check at their forums. I've also gotten good responses from Jenny. And yup... nasty to get negatives :) Was there a lot of errata for the old CWP?:001_unsure: I have the old CWP which I am hoping to start soon and would really want to see an errata sheet if there is one.:) Quote Link to comment Share on other sites More sharing options...
zoo_keeper Posted December 2, 2011 Author Share Posted December 2, 2011 Thanks, everyone. I signed up at the SM forum (no reply yet) and checked the errata list and this problem isn't on there. I appreciate the help :) Quote Link to comment Share on other sites More sharing options...
Dana Posted December 2, 2011 Share Posted December 2, 2011 Was there a lot of errata for the old CWP?:001_unsure: I have the old CWP which I am hoping to start soon and would really want to see an errata sheet if there is one.:) Not a lot. I think the most were in 6 and I think they've got those errata still up. Quote Link to comment Share on other sites More sharing options...
zoo_keeper Posted December 2, 2011 Author Share Posted December 2, 2011 Update: Jenny's reply is below... "Yeah, looks like they did not analyze the problem thoroughly. Lots of these problems are adaptations of others. I will put this in the errata so the publisher can correct this." Quote Link to comment Share on other sites More sharing options...
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