Author 
Topic 

IG0800
New Member
USA
2 Posts 
Posted  04/24/2012 : 21:33:00

Mr.hall made dog toys by braiding two 12inch strips of fabric. The strips are three inches wide. There 20 dogs in the shelter. How many 12 inch strips of fabric will they need to make a chew toy for all dogs? 


the_hill1962
Advanced Member
USA
1468 Posts 
Posted  04/25/2012 : 16:22:57

This is just simple multiplication. Please tell us what you think needs to be multiplied. 


ever22
Junior Member
United Kingdom
3 Posts 
Posted  05/12/2012 : 16:46:06

quote: Originally posted by IG0800
Mr.hall made dog toys by braiding two 12inch strips of fabric. The strips are three inches wide. There 20 dogs in the shelter. How many 12 inch strips of fabric will they need to make a chew toy for all dogs?
You just need to do 12 20 which is 240 


Subhotosh Khan
Advanced Member
USA
9116 Posts 
Posted  06/29/2012 : 21:01:00

quote: Originally posted by ever22
quote: Originally posted by IG0800
Mr.hall made dog toys by braiding two 12inch strips of fabric. The strips are three inches wide. There 20 dogs in the shelter. How many 12 inch strips of fabric will they need to make a chew toy for all dogs?
You just need to do 12 20 which is 240 ..Incorrect
You'll need 2 strips for a toy for 1 dog
For 20 dogs, you'll need (2*20 = ) 40 strips
Length (12") and the width (3") are not relevant.

Edited by  Subhotosh Khan on 06/29/2012 21:02:02 


the_hill1962
Advanced Member
USA
1468 Posts 
Posted  06/30/2012 : 18:19:37

Yes, the beginning student would want to do something with the "12" and the "three". It takes some experience to know that the 12 and three are not used to solve this problem. Isn't math wonderful? I do not teach 6th grade math but I wouldn't think this is too complicated. For those that do teach in the 6th grade, I would like to read a reply describing why the 12 and the three are not used. It doesn't seem like I had to do story problems like that back in 6th grade but I don't remember for sure. In my opinion, trying to have students do too tricky of problems is what gets them turned off from math. I think that having the 12 and the three are just in this problem to make for a 'trick' question. 
Edited by  the_hill1962 on 06/30/2012 18:34:03 


Subhotosh Khan
Advanced Member
USA
9116 Posts 
Posted  07/02/2012 : 06:08:24

I think this is a perfect "6th grader" problem.
Multiplying 2 by 20 and getting 40 as answer is a 2nd grade problem. I hope objective of this problem was not  to find out whether the student can do simple multiplication!
Here a situation is presented  not too complicated  but student has to choose pertinent data.
This is a very important skill that should be picked up about this time  and this (in my opinion) makes the word problem.
This is important skill set for developing "critical thinking" ability. 



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