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6.3
Integers
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Numbers get smaller
Numbers get larger
Key words positive- gain, above, increase, ahead,
deposit, elevation
Key words negative- loss, below, decrease
Ordering and comparing integersMake a number line and graph the integers on the
number line! Easy!
Practice- Order from least to greatest (set table)
2, -5, 3, 0, -2
NOW….order them greatest to least (you just go
backwards!)
Okay, now let’s add and subtract integers (7.5)
Use a number line to help. All you do is pay attention
to just the sign of the integer. No sign means it is
positive.
1. -5 + -7= -12 same as -5-7= -12
2. 6 + -10= -4 same as 6 – 10= 4
3. I-7I – I-5I= 2 absolute value 7 – 5 = 2
6.3 Vocabulary
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integers
The set of whole numbers and their opposites (…-3,
-2, -1, 0, 1, 2, 3…).
positive integer
An integer that is greater than zero; it is located to
the right of zero on a number line.
negative integer
An integer that is less than zero; it is located to the
left of zero on a number line.
whole number
A number that has no decimal or fraction. Examples:
6, 10, and 1
opposite
The opposite of a given integer can be found by
adding or taking away a negative sign (-). For
example, the opposite of -13 is 13, and the
opposite of -8 is +8.
absolute value
On a number line it is the distance between the
number and zero. Uses l l symbol.
Ex-symbol for absolute value |-20| = 20 and
read "The absolute value of -20 equals 20".
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PRACTICE
Put the integers in order from
least to greatest.
1. 8, 3, -6, 6, 11, -8
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Remember- use a number
line to place integers in
order.
But pay careful attention to
which direction is asked for.
2. -31, -20, 32, 63, l-58l
Set your table and you will
have it in the correct order.
Order from greatest to least -2, 0, 4, -3, 1
3. 56, -45, l-16l , -19, -55, 10
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