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long division for students who can't multiply
Old 02-13-2009, 10:15 AM
 
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I'm looking for words of wisdom and advice on how to help my students with long division when they still don't know their multiplication facts. To be more precise, our current unit is focused on long division with decimals. They struggle and are frustrated, but I'm required to teach it.
Thanks for any advice you have.


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I have them do all the multiplication first.
Old 02-13-2009, 12:10 PM
 
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If a number is divided by 7, I have them write out all the 7 facts: 2x7, 3x7, 4x7 etc. This gives them the time to do repeated addition if needed.

Then they can get to the dividing. They reference their previous multiplication work and can keep the rhythym of Does McDonalds Sell Cheese Burgers.

It's late, it's vacation, I'm toast- hope this made sense!
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Long Division
Old 02-13-2009, 01:36 PM
 
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Teachcal,
Here's something that may assist you. I tried it with my class and they enjoyed it! My very slow students were engaged and participated the whole math period.
Good Luck!

http://www.doubledivision.org/
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Old 02-13-2009, 03:10 PM
 
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I know your hands are probably tied here, but it's crazy to spin your wheels teaching long division when they don't know their multiplication facts. If it were me, I'd (subversively, if I had to!) take a few weeks and nail the facts. I've had classes like this before, too, and instead of assigning homework problems, I assigned math fact practice, did daily speed drill assessments until at least 80% knew them...then we could move on.
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Old 02-13-2009, 06:09 PM
 
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Even if they do not know multiplication I understand that the long division is part of the curriculum that you must teach. I let my students use a mult. chart. I let them check it with a calculator too. They have to show all their work, but having a calculator has helped. I know there are educators who may disagree with the calculator, but I still do x tests once a week and they do get to use a calculator on the state math test. I use an overhead calculator and I go through steps on how to use the calculator as a tool. I talk out the problem in steps like hmm, I need to check this on my chart. That looks right, let me double check it w/ my calculator, etc.


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Old 02-13-2009, 06:57 PM
 
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Which state allows a calculator?
I am really shocked!
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MD does
Old 02-14-2009, 09:08 AM
 
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But only for one of the math days.
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Calculators on State Tests
Old 02-14-2009, 12:00 PM
 
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Tests that allow the use of calculators are normed differently than those that do not - at least that's my understanding.
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Old 02-15-2009, 07:16 AM
 
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My weaker students, whether they know their multiplication facts or not, have been successful with the partial quotients algorithm. Generally they are working with multiples of ten and hundred, so that is so much easier. Also not having to "bring down" adds to the ease. I'll be gad to copy directions and samples to anyone. It took me a while to be comfortable with it, but it has been a true life saver for many of my children.
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Multiplication chart
Old 02-16-2009, 06:08 AM
 
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I agree with babyruth, I allow my children to use a mult. chart when learning the process of long division. We are not allowed to use the charts on our state testing, however.

One of the 4th grade teachers has her kids make up their own sayings for the procedure (DMSCB) this helps solidify the order in which things are done.

I hope these help, good luck with division.


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Old 02-16-2009, 11:46 AM
 
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I'm really not trying to be a jerk here, but when do they learn how to multiply? When they're trying to learn fractions later? or percents? What I see happening in math instruction these days is pushing more concepts at younger and younger ages without ever building a foundation. In my 3rd grader's classroom, they're "finished" with the multiplication tables...they spent less than 6 months learning them and I know she doesn't know them. She will by next year, because we're going to spend all summer making sure she knows them, but what about the rest of the kids in her class? I know our 4th grade teacher doesn't "teach" multiplication; she just expects them to know it.
AAARG! It just frustrates the snot out of me! There, I'm done : )
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Old 02-16-2009, 04:59 PM
 
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Illinois - calculators - I can not remember if it is for 1 or all, but I remember them using them last year!
I have many kids who come to me (5th) who do not know their mult. facts. Within the curriculum, they are required to already know them! We make mult fact cards, I provide them many sites to practice on, we take tests weekly. I believe they HAVE to know them, but... not everyone agrees and it is something I add in because it is something I feel is important. I still have kids who have a hard time with them and then the division process. Hopefully, in learning the process, soon enough they will be able to use a calculator for a quick check or not at all.
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Math Facts
Old 02-19-2009, 05:48 AM
 
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Every Friday is spent working on math facts in my classroom. We do a lot of different activities and games to help them learn their facts, but I am amazed at how many of them are clueless! The principal suggested using one of the number charts, but that is just giving them the easy way out and not teaching them to learn their facts. I'm struggling with this just like you
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Long Division
Old 03-05-2009, 10:22 AM
 
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I don't know the correct name for this method of long division. Some people call it double division but it is the first way I would teach a class to divide. A student does not have to know all their times tables and it is much easier to explain and understand. I actually enjoy it.

http://ssrsbstaff.ednet.ns.ca/jcroft2/long_division.htm
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Thank You Everyone
Old 03-11-2009, 07:59 PM
 
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I basically did what myoung suggested. I had to continue teaching decimal long division, but changed their homework to basic multiplication and division practice 3x4=12 123=4, etc. They started turning in their homework when I did that. I tried teaching what I call repeated subtraction and several write out the multiplication problems. The class is made up of at-risk and resource students. They are very resistant to anything new and anything that seems like extra work. I am going to continue to use their homework as basic skills practice and save the required content for our class time where I can help them. It is very frustrating to be required to teach something students are not ready to learn. Well, we have left long division for the time being for the equally ejoyable world of fractions. :-)
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