How much does it cost to mail this letter? Scholars approach the real-life scenario of adding postage as they practice introductory addition. Each letter has a total amount it needs, and learners draw in the appropriately-priced stamps (which are listed) to send it. This is a great way to practice three-addend math, as almost all of these require at least three stamps.  There are five total plus an example. Try mailing some real letters after completing this, or use it in conjunction with a language arts lesson on filling out an envelope.