Try this list of errata. Jennifer Hoerst (author of the Home Instructor Guides) also graciously answers email when you find something not listed.
http://www.singaporemaths.com/errata/
Singapore  Errors in books / Errata lists

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 Joined: Mon Jun 28, 2004 3:44 pm
 Location: Minnesota
Singapore  Errors in books / Errata lists
Julie, married 29 yrs, finding our way without Shane
(http://www.CaringBridge.org/visit/ShaneHansell)
Reid (21) college student; used MFW 3rd12th grades (20042014)
Alexandra (29) mother; hs from 10th grade (2002+)
Travis (32) engineer; never hs
(http://www.CaringBridge.org/visit/ShaneHansell)
Reid (21) college student; used MFW 3rd12th grades (20042014)
Alexandra (29) mother; hs from 10th grade (2002+)
Travis (32) engineer; never hs
Singapore Math question
With estimates, don't get too worried on it. yeah, typos happen on little stuff.Winkie wrote:I need a little help. Textbook 4A, page 18, Practice 1A, problem 8c. Round off each number to the nearest hundred and then estimate the value of 3948+208. My ds gets 4100 for the answer and I agree with him, but my Answer Key says 4200. Who is right?
The website for Singapore errata only lists the 2008 printing of the Answer Key, while I have one with a 2003 copyright.
4100
b/c it's 3900 + 200
my 2003 edition had it wrong on the answer too. I know I didn't even look at the answer key when we did those problems.
crystal
Re: Singapore Math question
We have found some errors in the answer key book. When there is a discrepancy between the answer my child gets and the answer in the book, I check over his work. Sometimes he is wrong and we work through it so he can see where he missed the problem. But sometimes he is correct and the answer key is wrong so I tell him that the answer key has the wrong answer and that he actually got it right. The only problem is that now every time he gets a different answer than the answer key, he thinks the answer key is wrong. We still look over his work, though, to make sure.
Amy C.
Amy C.
Re: Singapore Math question
Thanks ladies! I was feeling a bit braindead that day to solve the problem myself. Probably why I use the Answer Key most of the time to check their answers Besides I find it much faster to skim a column of numbers than to think through the math myself, even when it's easy. I have caught a few mistakes here and there in the Answer Key but I don't think it's rampant. I do write the correct answer in the key, for when my next student comes through that level.
Funny  my ds is the same way.Amy C. wrote:The only problem is that now every time he gets a different answer than the answer key, he thinks the answer key is wrong.
~Wendy
6 boys, 1 girl + 1 longawaited baby sister
Completed MFW from K to Graduation
201819 will use US1, and ECC (for the 3rd time!)
6 boys, 1 girl + 1 longawaited baby sister
Completed MFW from K to Graduation
201819 will use US1, and ECC (for the 3rd time!)
Re: Singapore Math question
I have used the few times I have found mistakes as moments to show my ds that everyone makes mistakes sometimes. He is easily discouraged when he makes mistakes so I look for these types of opportunities. I do correct the errors when I find them b/c I don't think my dd will have the same problem. (She sometimes needs a dose of humility. ) BTW, my ds has grown quite a bit more confident this past year since he has been out of ps.
Tammie  Wife to James for 27 years
Mom to Justin (15) and Carissa (12)
ADV & K 20092010 . . . RTR (again) & WHL 20162017
http://tammiestime.blogspot.com/
The days of a mother are long but the years are short.
Mom to Justin (15) and Carissa (12)
ADV & K 20092010 . . . RTR (again) & WHL 20162017
http://tammiestime.blogspot.com/
The days of a mother are long but the years are short.