- Example:

- Solution:
- Method 1:
- Method 2:

- Subtraction two mixed numbers
- Method 1 is the simple way to subtract two mixed numbers.
- If use method 2, add a parentheses to the subtracted mixed number, then
- changing the sign of each term when remove the parentheses.

- Rule:
- If there is a negative sign in front of parentheses, then changing the sign of each term when remove the parentheses.