Teacher2Teacher |
Q&A #4348 |
From: Ashley
To: Teacher2Teacher Public Discussion
Date: 2007100317:25:30
Subject: re: decomposing numbers
From my understanding it means to break the numbers down so that it is easier for children to add. For example 5+8. You would break the 5 down into 2 and 3. Then you add 8+2= 10+3= 13. When possible children should use this to get to 10, which then makes it easier to continue adding. Another example is 12+13. Break 12 into 10 and 2 and 13 into 10 and 3. Add 10+10= 20. 2+3=5. 20+5= 25. Hope this helps!
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