By: The Orange Team
Tammy Butler, Jim Conner, Jaime Cook , Tom Sorenson, & Florence Townsend
: What is it?
1. An
is a
whole number that can
be either greater than 0,
called positive, or less
than 0, called negative.
2. Zero is neither positive
nor negative.
3. Two
that
are the same distance
from the origin in
opposite directions are
called opposites.
: What is it?
Definitions
•The number line goes on forever in both directions. This is
indicated by the arrows.
•Whole numbers greater than zero are called
. These numbers are to the right of zero on the
number line.
•Whole numbers less than zero are called
. These numbers are to the left of zero on the
number line.
: What is it?
•The
negative.
zero is neutral. It is neither positive nor
•The sign of an
is either positive (+) or negative
(-), except zero, which has no sign.
: What is it?
•Two
are opposites if they are each the
same distance away from zero, but on opposite sides of
the number line.
•One will have a positive sign, the other a negative
sign.
•In the number line above, +3 and -3 are labeled as
opposites.
Examples
2 is less than 5 because … 2 lies to the left of 5
-1 is greater than -3 because … -1 lies to the right of -3
-4 is less than 1 because … -4 lies to the left of 1
6 is greater than -2 because … 6 lies to the right of -2
: What is it?
What it IS!
What it CAN be!
What it is NOT!
A whole number
A zero (0)
A positive number
A negative number
NOT a fraction
A thing complete in itself
Numbers used in counting
NOT a decimal
: Putting It To Use
Example 1:
Write an
1.
2.
3.
4.
to represent each situation:
10 degrees above zero = +10
a loss of 16 dollars = -16
a gain of 5 points = +5
8 steps backward = -8
: Putting It To Use
Example 2:
Name the opposite of each
-12
+12
+21
-21
-17
+17
+9
-9
.
: Putting It To Use
Example 3:
Name 4 real life situations in which
used?
1.
2.
3.
4.
can be
Spending and earning money.
Rising and falling temperatures.
Stock market gains and losses.
Gaining and losing yards in a football game.
: Summary
are the set of whole numbers and
their
opposites.
Whole numbers greater than zero are called
positive
.
Whole numbers less than zero are called
negative
: Summary
The
zero is neither positive nor
negative, and has no sign.
Two
are opposites if they are
each the same distance away from zero,
but on opposite sides of the number line.
or
Positive
without a sign.
can be written with
Games
Copy The Link
Name of the Game
http://www.funbrain.com/cgibin/nl.cgi?A1=c&A2=4&A3=2&A4=[2][7]
[-5][1]&A11=0&A12=0
Line Jumper
http://www.funbrain.com/cgibin/gn2.cgi?A1=s&A2=10&A3=1&A14=3
&A15=1
Guess The Number?
http://amby.com/educate/math/integ_
x1.html
Integers: Exercises with Signed
Numbers
References
• http://www.math.com/school/subject1/lesso
ns/S1U1L10DP.html
• http://www.funbrain.com/cgibin/gn2.cgi?A1=s&A2=10&A3=1&A14=3&A15
=1
• http://www.mathgoodies.com/lessons/vol5/i
ntro_integers.html