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You are HERE >> Mathematics > Algebra > Grade 1

 Number Sense and Numeration Lesson 2 - Turn Around Addition
by Elaine Ernst Schneider

 
 
 
 
 

 


 

Objective(s): By the end of this lesson the student will be able to: 
1. remember this rule of operations: 

Addition and Multiplication can Always be Mixed up.
For Subtraction and Division, Same order is Desired.

Note to teacher, parent, or tutor: These problems demonstrate the associative property of addition. The property is also true of multiplication.  Teaching this as a foundational truth now will facilitate pre-algebra concepts that your child will meet with in the future. 


Outline:

Did you know that if you add 4, 3 and 2, it is the same as adding 3, 4 and 2 or 2, 3 and 4? You can turn the numbers around any way that you like in addition!

  4                 3                   2
  3                 4                   3
+2               +2                +4 
  9                 9                   9

When you add, you can mix the order of the numbers all around and you will get the same answer. Let’s try some more problems.
 
 

  5
  6
  2
  2
  5
  6
+6
+2
+5





.
.
.
.




  2
  7
  4
  4
  2
  7
+7
+4
+2





.
.
.
.




  8
  3
  2
  2
  8
  3
+3
+2
+8

        




 

Submitted by:  © Elaine Ernst Schneider  is a freelance writer and a teacher. She has been writing since high school and has published articles, songs, and children's work. Presently, Elaine is a curriculum author for Group Publishing and also writes the City Songs column for www.newcolonist.com ezine.  Send a note to Elaine.
Feedback: Log your comments here.

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