Objective: I know how to subtract integers

To subtract integers, rewrite as adding opposites and use the rules for addition of integers.

Recall that the rules for adding integers are:

Rule 1:

The sum of two or more positive integers is a positive integer.

The sum of two or more negative integers is a negative integer.

Rule 2:

To find the sum of a positive and a negative integer:

Subtract the two numbers (ignore the signs) and then keep the sign of the larger integer.

*Example:*

9 -14 = 9 + (-14) = -5

-12 - 6 = -12 + (-6) = -18

-10 - (-7) = -10 + (- - 7) = -10 + 7 = -3

Refer to the lesson on subtracting integers for more information and examples.

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