Download integers

TEKS 6.1C
Lesson 2 (2nd 6 Weeks)
Integers
include whole numbers, zero, and negative
whole numbers.
can be represented on a number line that
extends in both directions from zero.
Integers to the right of 0 are read using the word
positive.
Ex: +6 is read as “positive 6”
Integers to the left of 0 are read using the word
negative.
Ex: -6 is read as “negative 6”.
The number 0 is neither negative nor positive.
The integers decrease from right to left on the
number line.
Ex: -6 < -5 and -7 < -6
The integers increase from left to right on the
number line.
Ex: -5 > -6 and -6 > -7
use a negative sign to represent a negative
number
Positive integers can be written with or without a
positive sign, such as 2 or +2
If a number does not have a sign in front of it, it
can be assumed the number is positive.
Examples
An object fell 300 feet.
The integer -300 represent the change in height.
A football team gained 3 yards on the first
down.
The integer 3 represent the gain in yardage.
A price on a television is advertised as “Save
$250 off the regular price.”
The integer -250 represent the reduction in price.
The high temperature in Alaska was 17 degrees
below zero today.
The integer -17 represent the temperature.
The temperature was 45°F at 2:00 P.M. At 5:30
P.M. the temperature was 51°F.
The integer 6 represent the temperature increase.
The submarine was 50 feet below sea level.
The integer -50 represent the depth.
Example using a Number Line
Lindel mows lawns during the summer. He
begins at his house on Thursday. The first lawn
he mows is 7 blocks directly west of his house.
The second lawn he mows is 3 blocks directly
east of the first lawn. The last lawn he mows is 4
block directly west of the second lawn. Where is
Lindel from his house when he finishes mowing
the last lawn?
Lindel mows lawns during the summer. He begins at his house
on Thursday. The first lawn he mows is 7 blocks directly west of
his house. The second lawn he mows is 3 blocks directly east of
the first lawn. The last lawn he mows is 4 block directly west of
the second lawn. Where is Lindel from his house when he
finishes mowing the last lawn?
The model shows
that Lindel is 8
blocks west of his
house.
Lindel’s 3rd Lawn
nd
-4Lindel’s 2 Lawn
Lindel’s 1st Lawn
+3
-7
Lindel’s House