Adding, Subtracting, Multiplying, and Dividing Real Numbers.

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Presentation transcript:

Adding, Subtracting, Multiplying, and Dividing Real Numbers

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

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

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 = · -.3 = -.09

Division of Real Numbers