S 1.1 Lesson 5 Notes

Multiplying Negative and Positive Numbers

Multiplication Rules 
(yes you need to write this down)

• If numbers have THE SAME SIGN, the product will be POSITIVE.

• If numbers have OPPOSITE SIGNS, the product will be NEGATIVE.
  

Multiple Choice

 $5\cdot5=$  

• -25

• 25

Multiple Choice

 $5\cdot\left(-5\right)=$  

• 25

• -25

Multiple Choice

 $\left(-5\right)\cdot\left(-5\right)=$  

• 25

• -25

Multiple Choice

 $5\cdot\left(-5\right)\cdot\left(-1\right)=$  

• 25

• -25

Multiple Choice

Challenge Question!

 $\frac{1}{2}\cdot\left(-\frac{3}{5}\right)=$  

•  $\frac{3}{10}$  

•  $-\frac{11}{10}$  

•  $-\frac{3}{10}$  

•  $\frac{11}{10}$  

Done with Notes!

• Go back to today's Announcement and complete steps 3, 4, and 5.