1. Adding, Subtracting, Multiplying, and Dividing Real Numbers

2. Adding Real Numbers To add two numbers with the same sign: – Add their absolute values – Attach common sign To add two numbers with different sign: – Subtract smaller absolute value from larger absolute value – Attach sign with greater absolute value

3. Subtracting Real Numbers To subtract b from a add the opposite of b to a a – b = a + (-b)

4. Multiplying Real Numbers The product with two numbers with the SAME sign is positive -.5 · -.5 =.25.5 ·.5 =.25 The product with two numbers with DIFFERENT signs is negative -.4 ·.4 = -.16.3 · -.3 = -.09

5. Division of Real Numbers