**Adding Integers**

Drag the appropiate number of tiles to each side
of the **+** sign to model the question. When your
model matches the question, move all of the tiles to the left of
the **+** sign. If you have yellow and red tiles,
try placing a red tile on top of the yellow tile to show a **zero
pair**. Repeat with all of the zero pairs to see the integer
sum modelled by each set of tiles.