Add two-digit numbers

Add two two-digit numbers, including regrouping.

1. Combine ones, exchange ten ones for a ten, then combine tens.
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.

Combine ones, exchange ten ones for a ten, then combine tens.