Add within twenty

Add one-digit and teen numbers with a total at most twenty.

1. Make ten first when it helps, then add the remaining ones.
2. Work through the example. Explain how its evidence supports the answer.
3. Try a new question; use the explanation to check your thinking.

Try it together

Write or draw your own example with different numbers. Solve it, then ask a partner to check the method as well as the answer.

Make ten first when it helps, then add the remaining ones.