2.  Read each statement about the topic “Combining
Opposites.”
 Write down who you agree with and why.
Alex – “Combining opposites is just doubling the
number.”
Bryan – “Combining opposites would give you 0.”
Carrie – “I don’t know how to combine opposites.”
 You should start your sentence like this…
 I agree with Alex/Bryan/Carrie because…

3.  Equations and Expressions
 Variables
 Equality and the equal sign
 Balance

4.  Unit Plan
 Look at the first Learning Target
 Rank yourself – put a mark and the date underneath
 Students will learn to…
 Describe situations in which opposite quantities
combine to make 0.
 Describe the connection between opposites, zero
pairs and additive inverse.
 Define absolute value.

5.  What do you know about a number line?
 1 volunteer to write on the board
 Use the number line above to define the word
opposite.
 Opposite numbers are…
 Share your definition with the group behind you.
 Class definition?

6.  Two numbers that are the same distance from
0 on a number line, but in opposite directions,
are opposites.
 Practice…
 Find the opposite of each number
a. -8 b. 13 c. -22
a. 8 b. -13 c. 22

7.  This is a definition from Learnzillion.com.
 What is absolute value?
 Create a human number line.
 Absolute Value is the distance from 0. Can’t be
negative. ( How many hops to get to 0?)

8.  What is their score?
 How can you represent this on a number line?
 How can you represent this mathematically?

9.  What is the expression (math sentence) to
solve this problems?
 5 + -5 or -5 + 5
 In either case, the answer is 0.
 When you combine opposites, is it always
equal to zero? (think about the scale, does it
balance??

10.  You have discovered Additive Inverse
 The sum of a number and its additive inverse
is 0.
 In other words, when you add a number and it’s
opposite, you get 0. (Remember the Balance?)
 Sort of like canceling each other out.

11.  These are also called Zero Pairs, because they
combine to equal 0.
 1 and -1
 -10 and 10
 -1000 and 1000

12. Opposites – Numbers that are the same distance
from 0, but in opposite directions.
Zero pairs – A pair of numbers that add up to 0.
Additive Inverse – Means “add the opposite.” If
you have -7 + ? = 0. 7 is the additive inverse of -7.
Basically their opposites.

13.  If you agree with someone new, write your
reasoning in your notebook.

14.  Money
 Football

15.  Can you…
 Describe situations in which opposite quantities
combine to make 0?
 Can you…
 Define opposites, zero pairs, and additive inverse
and give examples of each?