This bundle includes addition and subtraction within 20 flashcards to teach early learners their facts!This download includes 440 total flashcards with addition and subtraction facts to 20.Print and laminate flashcards, add to a binder ring, or place in inexpensive photo books so students can write in the answer with an expo marker!This is a great activity for math centers, morning work, math fact fluency, or small group work. Pair with manipulatives or record sheet for an instant math center! T