1. In this lesson you will learn how to add and subtract mixed numbers by grouping the problem into wholes and fractions and by re-naming the sum or difference to reflect an answer in simplest form.

2. 2 1 3
You already know… =

3.
3: 3, 6, 9, 12
4: 4, 8, 12

4. −2 1 6
4: 4, 8, 12
6: 6, 12

5. You just learned how to add and subtract mixed numbers
You just learned how to add and subtract mixed numbers. You did this by grouping the problem into wholes and fractions and by re-naming the sum or difference to reflect an answer in simplest form.