 Two Rules: 1. To add numbers with the same sign, ADD the absolute values and the answer has the same sign as the original numbers.  EXAMPLE: 3 + 16.

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Presentation transcript:

 Two Rules: 1. To add numbers with the same sign, ADD the absolute values and the answer has the same sign as the original numbers.  EXAMPLE: = 19  = -8  2. To ADD numbers with different signs, SUBTRACT the absolutes values and the answer has the same sign as the number with the largest absolute value.  EXAMPLE: = = 4  = = -3  = 10 – 4 = -6

 The OPPOSITE of a number is also called its ADDITIVE INVERSE.  So Subtracting is ADDING THE INVERSE!  In Algebra: a - b = a + (-b)  OR  a minus b equals a plus the opposite of b. EXAMPLES: = 6 + (-11) = -5

 Page 76: # 3-15:  Handout: 2.2 Practice: Adding and Subtracting Rational Numbers

 Page 76 #22-52 EVENS