Part-Part Whole Whole Unknown

Part-Part Whole/ Whole Unknown

Direct Modeling:

Joining All

IIIII

IIIIIIII

5 + 8 = _

Counting:

Counting on From First

5IIIIIIII=13

5 + 8 = _

Counting on From Larger

8IIIII=13

8 + 5 = _

Numerical Facts:

I know 10 + 5 = 15

I know 8 is 10 - 2

15 - 2 = 13