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Connie had 5 marbles. Juan gave her 8 more marbles. How marbles does Connie have altogether?

Direct Modeling media type="file" key="jru connie,juan.mov" width="240" height="240" align="left"

5+8 = 13

Counting media type="file" key="Movie on 2010-09-21 at 14.11.mov" width="243" height="243" align="left"

8+5 = 13

media type="file" key="Movie on 2010-09-21 at 14.05.mov" width="243" height="243" align="right"

5+8 = 13

Facts

-Student is unsure of the fact 5+8 -Student breaks apart 8 into 5+3 -Student continues to add: 5+5=10--> 10+3=13

-Student is unsure of the fact 5+8 -Student breaks apart 5 into 2+3 -Student continues to add: 8+2=10-> 10+3=13

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