1.OA.B.3

Apply properties of operations as strategies to add and subtract. Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)

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Not Right For WatchKnowLearn
Ages: 8 - 11
6902 Views:
Properties of Addition - by StudyJams
From scholastic.com, produced by Scholastic
Addition properties are rules that you can follow when adding numbers.  The commutative property, assiciative property, and identity, or zero, property are the rules.  They can make adding as simple as singing a song.  Learn more about the properties... [more]
Found by begamatt in 1.OA.B.3
June 18, 2011 at 10:36 PM
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Not Right For WatchKnowLearn
Ages: 8 - 12
6760 Views:
Addition Properties- Commutative, Zero and Associative Properties
From eduplace.com, produced by Houghton Mifflin
Students will learn to use the properties of addition to make addition easier.  The associative property says that addends can be grouped in any order.  Changing the order that numbers are added does not change the sum.  The sum of zero plus a number... [more]
Found by tinag1974 in 1.OA.B.3
May 20, 2010 at 03:58 PM
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Not Right For WatchKnowLearn
Ages: 5 - 8
4207 Views:
Addition Strategy - Adding Three One-Digit Numbers
From eduplace.com, produced by Houghton Mifflin
Students learn to add three one-digit numbers. Numbers can be added in any order.  Look for an addition fact that you know, then add.
Found by tinag1974 in 1.OA.B.3
May 14, 2010 at 01:58 PM
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Not Right For WatchKnowLearn
Ages: 8 - 14
3360 Views:
Addition Techniques
From YouTube, produced by Lawrence Perez
This video indicates it is for pre-algebra, however this would be good for anyone who is reviewing or learning place value. This video has humor, which helps make the lesson fun. Video shows how to use the number line, shows how to use the number lin... [more]
Found by Barb in 1.OA.B.3
July 31, 2009 at 08:00 AM
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Not Right For WatchKnowLearn
Ages: 5 - 10
3456 Views:
Basic Subtraction - Khan Academy
From YouTube, produced by Salman Khan
Begins with a review of addition (in simple terms) with visual support. Number line is also used to demonstrate principles. (08:32)
April 3, 2009 at 01:34 AM
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Not Right For WatchKnowLearn
Ages: 7 - 10
2699 Views:
Introduction to Addition with Carrying - Khan Academy
From YouTube, produced by Sal Khan
This video teaches adding a 2-digit number to a 1-digit number with an introduction to carrying. The narrator of the video walks you through the mathematical computations in ten minutes. (09:48)
Found by grazianione in 1.OA.B.3
July 11, 2009 at 08:11 AM
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Not Right For WatchKnowLearn
Ages: 8 - 14
3183 Views:
Subtracting Numbers on a Number Line
From YouTube, produced by Lawrence Perez/Candice Jhu
The instructor uses humor to demonstrate how to subtract numbers on a number line. The video features a dual screen, and sometimes a three-part screen for demonstration. (06:23)
March 18, 2010 at 08:40 PM
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