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ADDITION: If the signs are the same then you add the two numbers and keep the sign. Ex. 6 + 2 = 8 or 6 + 2 = 8 If the signs are different, subtract the two numbers and take the sign of the larger number. Ex. 6 + 2 = 4 or 6 + 2 = 4 SUBTRACTION: Change the sign of the second number, then add the two numbers using the rules for addition, above. Ex. 6  2 = 6 + (2) = 4 Ex. 6  2 = 6 + (+2) = 4 Ex. 6  2 = 6 + (2) = 8 Ex. 6  2 = 6 + (+2) = 8 Doctors Sonya and Jennifer, The Math Forum Check out our web site! http://mathforum.org/dr.math/
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