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##### need serious help with dividing decimals

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 alwallace212 Joined: Aug 2010 Posts: 5 New Member
alwallace212

Joined: Aug 2010
Posts: 5
New Member
need serious help with dividing decimals
08-30-2010, 05:48 PM
 #1

Anyone in the Proteacher community that has a easy method for teaching dividing decimals, I could sure use it. I have been working with my students for 4 weeks now and every time I assess their mastery my class average is well below 50%. I'm at a loss. This is a state standard that they must know how to do for the state test.

 imalith Joined: Oct 2005 Posts: 1,379 Blog Entries: 29 Senior Member
imalith

Joined: Oct 2005
Posts: 1,379
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analyze the work
08-31-2010, 05:13 AM
 #2

Are they all having trouble with just dividing, or moving the decimal? Or a mixture?

 alwallace212 Joined: Aug 2010 Posts: 5 New Member
alwallace212

Joined: Aug 2010
Posts: 5
New Member
need help
09-01-2010, 06:25 PM
 #3

It is a mixture of not knowing how to do long division and multiplication and making mistakes like forgetting to put the decimal in the product or quotient.

 Apricot Joined: Feb 2010 Posts: 191 Blog Entries: 1 Full Member
Apricot

Joined: Feb 2010
Posts: 191
Full Member
division
09-02-2010, 10:11 PM
 #4

Hmmm, are they making similar mistakes with just regular division problems with no decimals? Are they lacking the basics needed in order to do division with decimals? Maybe back-track and do simple division problems and slowly introduce decimals.???

 trishg1 Joined: May 2009 Posts: 10,427 Senior Member
trishg1

Joined: May 2009
Posts: 10,427
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09-03-2010, 03:46 AM
 #5

You are going to have to decide on what is important here. If learning to multiply is important, then master that and use a calculator to divide. If learning to divide is important, then give them a multiplication chart and a step by step guide on division. I use Does McDonald's Sell Cheese Burgers to teach the steps in long division. Asking students to master multiple processes at one time is a recipe for failure. It's more work on your part, I'm afraid, but you will in time see results.

 sassymollasi Joined: Jul 2008 Posts: 579 Senior Member
sassymollasi

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Posts: 579
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09-14-2010, 07:26 PM
 #6

trishgirl... what does Cheese stand for?

PS. I agree, go back and do a little re-teaching. I have only been in school a few weeks and am no where near ready to tackle long division with decimals... maybe long division.

 trishg1 Joined: May 2009 Posts: 10,427 Senior Member
trishg1

Joined: May 2009
Posts: 10,427
Senior Member

09-15-2010, 01:32 AM
 #7

Does= divide
McDonald's= multiply
sell= subtract
Cheese= compare
burgers= bring down

Since stopping on "cheese" is a little awkward, it makes them stop and think...is my remainder smaller than my dividend? Are there any more digits in the dividend?

 sassymollasi Joined: Jul 2008 Posts: 579 Senior Member
sassymollasi

Joined: Jul 2008
Posts: 579
Senior Member

09-15-2010, 09:30 PM
 #8

Cheese - Compare. Got it.

I always teach: Every Monster Sucks BlooD
E= Estimate
M= Multiply
S= Subtract
BD= Bring down

But I LIKE the "compare" step!! I wonder
Every Monster Sucks CREEPY BlooD? Hee hee...

Last edited by sassymollasi; 09-15-2010 at 09:32 PM.. Reason: spelling

 Jewelsey Joined: Aug 2009 Posts: 30 Junior Member
Jewelsey

Joined: Aug 2009
Posts: 30
Junior Member
My Division Family
09-24-2010, 04:28 PM
 #9

I haven't come close to decimal division yet either. We are still working on just long division... especially with 2 digit divisors.

I teach division using a division family.

Mom = Multiply
Sister = Subtract
Brother = Bring Down
Rover (the dog) = Repeat or Remainder

But I like the idea of Checking too! I might have to add in Chester (the cat).

 maryteacher5 Joined: Jun 2011 Posts: 94 Full Member
maryteacher5

Joined: Jun 2011
Posts: 94
Full Member

06-26-2011, 05:41 PM
 #10

This always works for my kids. They always remember the saying also. I still have kids that come back to me saying the saying helped in other grades.

 maryteacher5 Joined: Jun 2011 Posts: 94 Full Member
maryteacher5

Joined: Jun 2011
Posts: 94
Full Member

06-26-2011, 05:42 PM
 #11

sassy-I love this one.

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