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Adding Integers

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Adding Integers with the Same Sign Add the absolute values. The sum will have the same sign as the addends. Example 1 Find –2 + (-3)

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Adding Integers Adding Integers with the Same Sign Add the absolute values. The sum will have the same sign as the addends. Example 1 Find –2 + (-3) Start at zero. Move 2 units to the left. Then, move 3 more units to the left.

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Adding Integers Adding Integers with the Same Sign Add the absolute values. The sum will have the same sign as the addends. Example 1 Find –2 + (-3) Start at zero. Move 2 units to the left. Then, move 3 more units to the left. –2 + (-3) = -5

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Adding Integers Adding Integers with Different Sign Subtract the absolute values of the integers. The difference will have the same sign of the integer with the greater absolute value. Example 2 Find –4 + 5

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Adding Integers Adding Integers with Different Sign Subtract the absolute values of the integers. The difference will have the same sign of the integer with the greater absolute value. Example 2 Find –4 + 5 Start at zero. Move 4 units to the left. From there, move 5 units to the right.

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Adding Integers Adding Integers with Different Sign Subtract the absolute values of the integers. The difference will have the same sign of the integer with the greater absolute value. Example 2 Find –4 + 5 Start at zero. Move 4 units to the left. From there, move 5 units to the right. –4 + 5 = 1

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Adding Integers Adding Integers with Different Sign Subtract the absolute values of the integers. The difference will have the same sign of the integer with the greater absolute value. Example 3 Solve x = 10 + (-4) + (-7).

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Adding Integers Adding Integers with Different Sign Subtract the absolute values of the integers. The difference will have the same sign of the integer with the greater absolute value. Example 3 Solve x = 10 + (-4) + (-7). x = 10 + (-4) + (-7) Add –4 and –7.

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Adding Integers Adding Integers with Different Sign Subtract the absolute values of the integers. The difference will have the same sign of the integer with the greater absolute value. Example 3 Solve x = 10 + (-4) + (-7). x = 10 + (-4) + (-7) = 10 + (-11) Add –4 and –7. Subtract absolute values.

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Adding Integers Adding Integers with Different Sign Subtract the absolute values of the integers. The difference will have the same sign of the integer with the greater absolute value. Example 3 Solve x = 10 + (-4) + (-7). x = 10 + (-4) + (-7) = 10 + (-11) = -1 Add –4 and –7. Subtract absolute values. The result is negative because |-11| > |10|.

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Adding Integers Rules to Remember: Same Sign - keep the sign and Add Opposite Signs – keep the sign of the larger number and subtract (Big number does the talking)

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