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Subtraction of mixed number with the same denominator

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.