This addition and subtraction homework, or classwork, pack includes 20 half-sheets that are specifically aligned to 3.NBT.2. However, because the focus is on addition and subtraction (mainly conceptual strategies), it would also be good for any classroom practicing and/or reviewing addition and subtraction understanding.This homework comes with a PDF version and an editable version so that changes can be made if necessary. I feel homework should closely align what is done in the classroom, so ha