Adding by 9 by Subtracting 1
A Great way to start Learning to Add by 9 is to go over Subtracting by 1.
If you Make 9 into a 10, all you need to do is take away 1 from the Other Addend, (Example: 10 + 5 could be written:
10 + (5-1) or 10 + 4 which, of course = 14.
You might l find this a quick way to remember the 6 Addition Facts.
Here are 2 Sets of Flash Cards in pdf form.
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