11/12 Lesson 3.2.3 Multiplication of Negative Integers

1.  Warm-up:  IN CLASSWORK section- For each of the following expressions, make a prediction without actually calculating the answer.  Will the result be positive or negative?

a) -1 - (-6.5)                 b)  2.2 - (-2.2)

c)  -14 - (-12)               d)  -10 - (-2) - (-2) - (-2)


2.  Lesson 3.2.3 Multiplication of Negative Integers

• Objective:  I will understand why multiplying two negative integers results in a positive
• Class discussion
• Now you try:
• Draw a diagram and find the result
•  -2(-5)
•  -3(-3)
•  -6(2)
•   3(-4)

3.  Closure:  How do you think this will work with division?  Use -18 divided by 9 as an example.  Can you draw a diagram to represent this problem?

Homework:  Lesson 3.2.3 R/P (answers in GC)