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SECTION 2.2 ADDING INTEGERS
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STEPS Given the four options
1 a + b 2 -a + (-b) 3 -a + b 4 a + (-b) If you have option 1 or 2 , drop the signs, add the numbers together, then add a sign back. If you have option 3 or 4, drop the sign, subtract (larger - smaller), add the sign from the larger number.
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Option 1 Option 1 a + b Example 4,675 + 9,432 Drop the signs
add the numbers together add a sign back. Example 4, ,432
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Option 2 Option 2 -a + (-b) Example -123,459 + (-45,954)
Drop the signs add the numbers together add a sign back. Example -123,459 + (-45,954)
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Option 3 Option 3 -a + b Example -12,549 + 45,317 Drop the sign
subtract (larger - smaller) add the sign from the larger number. Example -12, ,317
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Option 4 Option 4 a + (-b) Example 9,619 + (-13, 412) Drop the sign
subtract (larger - smaller) add the sign from the larger number. Example 9,619 + (-13, 412)
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Examples (-321) (89) (-177)
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Example -6 + (-15) + (-7) 3 + 14 + (-18) -13 + 8 + (-10) + (-27)
(-14) + (-20)
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Example The all time record low temperature for Texas is -23˚ F, Florida’s all-time record low temperature is 21˚ F higher than Texas’ record low. What is Florida’s record low temperature?
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