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 designed 2 types of answer sheets to provide a choice if you want more room for your students to write the answers.