Add decimal tenths

Combine tenths using place-value reasoning.

1. Line up the decimal points so tenths combine with tenths.
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.

Line up the decimal points so tenths combine with tenths.