This is a collection of our finding the missing addends worksheets with answer keys. This includes various sets of addition worksheets to supplement your lessons. You can use these math sheets as a review, homework, quiz, pre test, assessment, drill, or practice for your students in the 2nd, 3rd, or 4th grades. *** View our Addition Bundle to save and get more activities. These are all the sets included in this packet. Show Solution – Missing Addend Show Solution – Missing Addend or Sum Fill i