Subtracting Signed Numbers

Subtracting Signed Numbers

Rule for Subtracting:
You can subtract a number by adding its opposite.

When subtracting two numbers, change the sign of the number being subtracted and then follow the rules for adding signed numbers.
(Subtracting a number is adding its opposite.)
Examples:

• 7 – (-3) = 7 + (+3) = 10
• -10 – (-7) = -10 + (+7) = -3
• -8 – (+6) = -8 + (-6) = -14
• 13 – 4 = 13 + (-4) = 9

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