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Adding 9 or 11

Before you can add 9 or 11, you must practice adding 10 and know how to do it really well! Make sure you have worked through the 'adding and subtracting 10' folder. 

 

Use our adding 9 'frog' strategy: 

 

When you see 9- think 10 and hop back 1 (which is explained in the PDFs below). 

 

Adding 11 strategy:

 

When you see 11- think 10 and hop forward 1.

 

We did this so well in class, so keep practicing- use your hundred square to help you! smiley 

 

 

This document has so many great ways to add 9 using the strategy above!

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