Subtraction of mixed number with the same denominator

Example:
mixed numbers subtraction examples
Solution:
Method 1:
subtraction of two mixed numbers examples
Method 2:
suntraction of two mixed numbers examples
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.