Choose an activity
Addition and Subtraction Within 20
Pick one to start!
Understanding Teen Numbers
10 and some more
Choose addition, subtraction, or teen-number practice with 10-and-some-more models.
Doubles Facts
Doubles to 10 + 10
Use ten frames, connecting cubes, fingers, and flashcards to learn and practice doubles facts.
Use Doubles to Subtract
Related addition and subtraction facts
Use equal groups to connect a known doubles fact to a related subtraction fact.
Doubles Plus 1
Near doubles addition
Use doubles facts to solve doubles plus 1 with ten frames, connecting cubes, and flashcards.
Make 10 Activities
Choose cups or ten frames
Move amounts or counters to make a friendly 10, then solve the addition problem.
Subtract From the Ten
Teen subtraction strategy
Use a full ten and leftover ones to solve teen subtraction facts.
Subtract in Parts
Break apart a subtraction fact at 10
Subtract the ones to reach 10, then subtract the amount that is still left.
Addition and Subtraction Flashcards
Choose an addition or subtraction fact set
Practice addition and subtraction facts with focused timed practice.