Download A2.5 Notes - dublin.k12.ca.us

2.5 – Multiplication of Rational Numbers
Multiplying a Positive Number and a Negative Number
To multiply a positive number and a negative number, multiply their
absolute values. The sign of the product is negative.
Example 1 – Multiply.
a. 3   2
b.  5  3
 1  2
c.      
 3  5 
d. 3.5   4
Multiplying Two Negative Numbers
To multiply two negative numbers, multiply their absolute values. The sign
of the product is positive.
Multiplicative Property of Zero
For an rational number n, n  0  0 .
(The product of 0 and any rational number is 0.)
Example 2 – Multiply.
 4 23
a. 876  0
c.
 3  4
b.       
 7  2
d.  7  3 5
e.  2 63 1
   
   
   
   
L15 – pg 79 (11-29 odd)