Use these certificates to recognize student achievement as they master their addition and subtraction facts! This packet contains 17 addition certificates and 17 subtraction certificates for you to recognize your students! There are certificates to recognize mastery of each fact from 0 - 10, and then summary certificates for mastery of facts within 5, 10, and then 20, as well as for both addition and subtraction. The summary certificates come in two forms - one where you can handwrite in the