Compare+Quantity+Unknown

= Compare Quantity Unknown =

Juan has 5 marbles. Connie has 8 more than Juan. How many marbles does Connie have?
Direct Modeling N/A

Modeling Strategy: Join All 5+8=13 media type="file" key="join all.mov" width="300" height="300"

Counting Strategy: Count on from first 5+8=13 media type="file" key="join all.mov" width="300" height="300"

Counting Strategy: Count on from last 8+5=13 = 8 l l l l = = l = 9 10 11 12 13

Facts Strategy: Derived Facts 8=5+3 5+5 -> 10+3 -> 13