If your students need practice in adding multi-digit whole numbers this set of task cards is just what you are looking for. It targets CCSS.MATH.CONTENT.4.NBT.B.4-building fluency in this skill.
There are 40 task cards with a variety of addition problems up to 7 places. Great Practice!
Student worksheets and an answer key are included. I've also included directions for playing scoot if you're looking for an additional fun activity to build fluency with your class.