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By Gavin McGerald ProductsProducts Objective: to review rules for multiplying real numbers

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By Gavin McGerald Multiplicative property of 0 For every real number a, a 0 = 0 and 0 a = 0 For every real number a, a 0 = 0 and 0 a = 0

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By Gavin McGerald Multiplicative property of -1 For every real number a, a(-1) = -a and (-1)a = -a For every real number a, a(-1) = -a and (-1)a = -a

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By Gavin McGerald Rules for Multiplication The product of two positive or two negative numbers is a positive number The product of a positive number and a negative number is a negative number The absolute value of the product of two or more numbers is the product of their absolute values The product of two positive or two negative numbers is a positive number The product of a positive number and a negative number is a negative number The absolute value of the product of two or more numbers is the product of their absolute values

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By Gavin McGerald Examples (-3)(-2)(-1)(4)(-5) = (6)(-1)(4)(-5) = (-6)(-20) = 120 (-4) 3 (-2)(-1/3) = -12 -2 -1/3 = 24 -1/3 = -8 24(-15)(0)(13) = 0 (-3)(-2)(-1)(4)(-5) = (6)(-1)(4)(-5) = (-6)(-20) = 120 (-4) 3 (-2)(-1/3) = -12 -2 -1/3 = 24 -1/3 = -8 24(-15)(0)(13) = 0

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By Gavin McGerald Property Of The Opposite Of A Product Property Of The Opposite Of A Product -ab = (-a)band-ab = a(-b) -ab = (-a)band-ab = a(-b)

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By Gavin McGerald Property Of The Opposite Of A Sum -(a + b) = (-a) + (-b)

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Adding and Subtracting Integers To add integers with the same sign, add their absolute values and then change the sign to the sign of the addends. Positive.

Adding and Subtracting Integers To add integers with the same sign, add their absolute values and then change the sign to the sign of the addends. Positive.

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