The missing addends task cards are a hands on approach to teaching missing numbers or part to whole. It incorporates use of a number line and technology using QR codes. Students love using QR codes and this allows for independent learning. Print on card stock, laminate, and students can write on them with dry erase markers or they can write the equations in a spiral.
There are 36 task cards and an answer key if you don't have use of a QR code reader. (QR code reader apps are usually free. A cell phone, iPad or computer with camera will work. There is also a cover sheet to place on the container where you store these.