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What are Integers?• Integers include all of the positive and negative whole numbers, and zero. Integers NOT Integers 3 -1.652 -4 ¾ 12 2.5 0 0.7
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Adding Integers• On a number line:1. Find the first number.2. Move the distance of the second number. a) Positive (+) numbers, move RIGHT b) Negative (-) numbers, move LEFT3. Where you land is the answer!Example: 5 + 8
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Adding Integers Rules• Use if you don’t have a number line.• When the integers are: ▫ Both Positive: add the numbers Ex: 4 + 6 = ▫ Both Negative: add the numbers and make it negative Ex: -2 + -5 = ▫ One Positive and One Negative: Subtract and use the sign of the bigger number. Ex: -7 + 4 =
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Subtracting Integers 1/31/13• Change the minus to a plus, and change the sign of the number you are subtracting.• Then add!• Ex: -14 – 6 =• Subtracting a Negative is the same as Adding!• Ex: 12 – (-3) =
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