LIFamilies.com - Long Island, NY


RSS
Articles Business Directory Blog Real Estate Community Forum Shop My Family Contests

Log In Chat Index Search Rules Lingo Create Account

Quick navigation:   

Anyone have alesson for teaching this...Math 3rd grade

Posted By Message

04bride
I'm a big sister!!!

Member since 5/05

6707 total posts

Name:
Noel

Anyone have alesson for teaching this...Math 3rd grade

I dont knwo what you call this but for example... _ +2=10. How do you teach them( i mean I need a lesson step by step procedure to teach them) how to solve this?

Message edited 9/9/2011 9:20:41 PM.

Posted 9/9/11 9:19 PM
 

SadiesMom
LIF Infant

Member since 7/07

124 total posts

Name:

Re: Anyone have alesson for teaching this...Math 3rd grade

I don't have a step by step lesson for you, but what about using manipulatives to help find the missing addend?

You could show the students that in order to find the missing addend it is necessary to balance what is found on both sides of the equal sign.

You could use 3 different colors. For example, using the problem you cited:
You could use 2 blue squares on one side... and show ten red squares on the other side. Students would then count out how many of a third color would need to be added in order to "balance" the equation.

From that point you could guide them to use subtraction, modeling with the manipulatives, in order to solve the problem.

Not sure if this was at all clear..lol...but I hope it helps. :)

Posted 9/10/11 6:36 AM
 

2BirdsofaFeather
Miracles can happen!

Member since 10/10

3319 total posts

Name:

Re: Anyone have alesson for teaching this...Math 3rd grade

We teach them to do the reverse operation on the other side vertically.

Posted 9/10/11 9:46 AM
 

jewels
Stop and smell the flowers

Member since 7/06

1538 total posts

Name:

Re: Anyone have alesson for teaching this...Math 3rd grade

We teach fact families and triangles. The triangle has the sum at the top and the addends on the bottom corners. The family includes the 2 addition probs and 2 subtraction probs. So if they can figure out that one of the subtraction probs is 10-2 then they should be able to figure out the answer to your prob.

Posted 9/10/11 1:52 PM
 

MrsH2009
Thank you St. Gerard!

Member since 8/09

6631 total posts

Name:
M

Re: Anyone have alesson for teaching this...Math 3rd grade

I teach it as a balance scale. Talk about what the equal sign means. What is on one side must be the same as what is on the other. Then use manipulatives to show how to balance the scale.
You can probably google missing addends for lessons.

Message edited 9/10/2011 2:21:02 PM.

Posted 9/10/11 2:20 PM
 

LiveItUp
Love my babies!

Member since 8/11

4096 total posts

Name:

Re: Anyone have alesson for teaching this...Math 3rd grade

It's basically algebra, except at that age they don't solve for 'x'. I would have them use manipulatives or draw a picture to show how many they need to add to 2 to get 10. I would also have them figure out 10 - 2 = ? to get the answer. I taught 3rd grade last year, and I remember my students having a tough time with this at first because it's pretty abstract for their age. But after some practice they got it and by the time of the state test it was easy for them. :)

Posted 9/10/11 7:11 PM
 
 

Potentially Related Topics:

Topic Posted By Started Replies Forum
State Math Testing in 3rd Grade? Teachers? EmmaNick 2/21/08 6 Parenting
Teaching 3rd grade this year after teaching 5th for five years...help!! MrsRivera 9/4/10 7 Teachers
Help with a 3rd grade math problem!! Missy 3/2/11 20 Parenting
3rd grade Math test? sometimesmommy 3/5/09 5 Parenting
Any 3rd/4th grade teachers out there? Melbernai 8/7/06 7 Families Helping Families ™
3rd grade teachers- Porrruss 6/21/06 2 Families Helping Families ™
 
Quick navigation:   
Currently 708572 users on the LIFamilies.com Chat
New Businesses
1 More Rep
Carleton Hall of East Islip
J&A Building Services
LaraMae Health Coaching
Sonic Wellness
Julbaby Photography LLC
Ideal Uniforms
Teresa Geraghty Photography
Camelot Dream Homes
Long Island Wedding Boutique
MB Febus- Rodan & Fields
Camp Harbor
Market America-Shop.com
ACM Basement Waterproofing
Travel Tom

      Follow LIWeddings on Facebook

      Follow LIFamilies on Twitter
Long Island Bridal Shows