Transcript Document

How can you use a number
line to show that opposite
numbers combine to make
0?
-5
5
In this lesson you will learn
how opposite quantities
combine to make zero by
using a number line.
Let’sReview
Review
Let’s
What is an opposite?
Opposites are the same distance from 0, but in
opposite directions.
-5 is 5 units to the LEFT of zero
5 is 5 units to the RIGHT of zero
A Common
Let’s
Review Mistake
5 + 5 = 10
whole number + whole number = whole number
-5 + 5 = 0
Think about combining gains and losses.
CoreReview
Lesson
Let’s
Amos and Brent are on a team together.
Amos scores 5 points on his turn, but
Brent loses 5 points on his turn. What is
their team score?
0
The team score is 0.
CoreReview
Lesson
Let’s
What if Brent went first? Brent loses 5
points and then Amos earns 5 points.
The team score would still be zero.
Therefore, combining 5 and -5 results in 0.
5 + (-5) = 0
-5 + 5 = 0
In this lesson you have
learned how opposite
quantities combine to make
zero by using a number line.
Guided
Practice
Let’s
Review
Candice and Destiny are on a
team. After each takes a turn their
team score is 0. If Candice earned 4
points on her turn, what was
Destiny's score?
4 + (-4) = 0
Destiny scored -4 points.
Extension
Let’s
Review Activities
Create a graphic that will illustrate a
number and its opposite combining to
equal zero. Be creative in your
approach.
Extension
Let’s
Review Activities
By applying the Commutative Property, list
5 pairs of opposite quantities combining
to make 0.
Quick Quiz
Let’s
Review
Demonstrate that -7 and 7 have a
sum of 0 using a number line. Then
write two equations state this fact.
Demonstrate that -3 and 3 have a
sum of 0 using a number line. Then
write two equations stating this fact.