Teachers, save “Strip Diagram Strategy to Add with Models” to assign it to your class.

Look at the ones place and move that many dots into the ten frames for each number. Decide which number is closer to its next 10. Move dots over to the ten frame that is closer to ten. Type the next ten number to that side of the strip diagram. Then subtract that difference from the other addend. Type that number. Add both new parts together to find the sum.