Section_1-6 - Section 1-6 Multiplying and Dividing Real...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Section 1-6 Multiplying and Dividing Real Numbers Objectives Understand multiplying/ dividing by 0, 1, -1 Understand what happens when multiplying/ dividing by negatives Identity property of Multiplication For any real number n, For any real number n, 1 n = n 0n = 0 Multiplication of Zero Multiplication of -1 For any real number n, -1 n = - n Multiplying numbers with the same sign The product of 2 positive numbers or 2 negative numbers is positive 7 8 = (-5)(-12) = (-7)(-8) = Multiplying Numbers with Different Signs The product of a negative number and a positive number is always negative - 39 = 3(-9) = Evaluate the following expressions y = -5 x = -3 2 xy - 3xy EXPONENTS AFFECT ONLY WHAT THEY ARE DIRECTLY TOUCHING!!!!!!!!!!!! -3 4 3 - 4 2 ( - 3) 4 Dividing numbers with the same sign The quotient is always positive - 18 (-6) = 16 4 = Dividing numbers with different signs The quotient is always negative (-18) (6) = 36 (-4) = Evaluate each expression x = -2 y=6 z = 20 4x + y 2 z 3 x y + 20 4 Multiplicative Inverse (fancy pants word for reciprocal) Every real number a has a multiplicative 1 inverse a such that a 1 = 1 a Dividing is the same as multiplying by the 2 3 x=- y= reciprocal. 5 10 y x x y HW # _____ P. 41 (6-12 even) (17-37 odd) (45-51odd) (61 & 73) ...
View Full Document

Ask a homework question - tutors are online