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Thread: Wrong Math Answers

09022015, 02:40 PM #1Member
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 Aug 2015
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Wrong Math Answers
I read some where that someone had mentioned they found T4L to give out wrong Math answers; I am now wondering if this is true?
My child just finished a quiz on order of operations and she got 2 wrong, I went and did them myself and got the same answer she did. So now I am concerned Math can be frustrating enough without the system failing.
Problem:
144/128+3
144/12=12
128+3
8+3=11
1211=1
Answer 1

09022015, 02:50 PM #2Junior Member Newbie
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 Aug 2015
 Posts
 1
Wrong answer!
Hi. My daughter just now experienced this also. She finished a quiz and tried really hard two see she had missed problems and then I did them and found they were correct. I guess it is a good thing we always go over the missed problems as review! I find this to be very discouraging along with the fact that the only grading process allows for averages and not to edit grades. understand grades are for teachers to show parents but they also allow the kid to visually see the hard work and the efforts of that. Best of luck!

09022015, 08:37 PM #3Junior Member Newbie
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 Aug 2015
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 1
RE: wrong math answer
I hope this answer might help, math can be tricky, especially order of operation. It looks like in the problem solving process a couple things went wrong...An equal sign was added to the problem making it an equation.
This is how I remember order of operation
Think of:
OEDMAS
O () Parenthesis
E Exponents
D M Division or Multiplication (in order from left to right)
A S Addition or Subtraction (in order from left to right)
So technically:
It could also be any of the following:
Just remember that Division and Multiplication you do which ever one comes first they are equal, the same with Addition and Subtraction.
OEDMAS
OEDMSA
OEMDAS
OEDMSA
If this is the original problem:
144/128+3
128+3
4+3
Answer 7
I hope this hasn't confused you further, this is the way I learned it a long time ago...I know there are other acronyms for it, but this is the one I remember.
From a Teacher now a Home School Mom

09032015, 11:33 AM #4Member
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 Aug 2015
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 32
Ok, no this hasn't confused me. I learned PEMDAS and that you multiply before you divide and you add before you subtract. hmm I'm going to have to call my sister in law. she's an algebra freak, lol. I'll see what she say and get back to this.

09032015, 05:22 PM #5Member
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 Jun 2015
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 40
you do whichever comes first in the problem (i think lol) so if it is 12  8 + 3 then you would solve doing subtraction first 12  8 then add 3 you have the PEMDAS (T4L uses GEMDAS) idea correct, but one of the minor rules for multiplication/division and for addition/subtraction is that whichever one comes first in the problem is the one you do first...at least that's how i understood it when i was doing the lesson with my son! (i got a couple wrong in the practice section lol)

One great thing about using an online curriculum is that any errors in the program can be easily fixed . . . unlike textbook publishers, who generally have a page on their website for each book, detailing all the errors. If you've bought that book, you are stuck with the mistakes. I've bought a few books that actually included a printout of errors with the book. :P
Like anything else, Time4Learning isn't perfect. The vast majority of reported "errors" regarding answers, though, are because of not understanding how to do the problem, or from accidentally typing a space before the answer or from using a zero for a letter "o" or vice versa.

09062015, 03:12 AM #7
Hi. I understand the frustration of seeing my child get an answer wrong according to the answer key while I believe he's right and can't do anything about it (I just asked support about this very thing).
In this case, charlenew1977 is right; the answer is 7. With PEMDAS, you do have to do parentheses before exponents, but when it comes to the multiplciation/division part, it doesn't matter what order those two are done, as long as they're done after the exponents and before the addition/subtraction. The order of addition/subtraction also doesn't matter as long as they're done after all other operations. What does matter is the sign before the number. For example:
144/128+3 can be figured as
144/12=12
then 128=4
then 4+3=7
or 144/128+3 can be figured as
144/12=12
then 8+3=5 (notice the  before the 8 is included in the addition part of the equation)
then 125=7
Whether you do the addition first or the subtraction first, either way you should get the same answer.
I hope this helps.

09112015, 03:09 PM #8
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 Sep 2015
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 2
I also learned PEMDAS! It will be interesting to hear a final answer...

09112015, 03:10 PM #9
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 Sep 2015
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PEMDAS is what I was taught too!