Chapter 6x

```IWBAT compare and order positive and
negative numbers.
Numbers get larger from left to right.
*Integers without a sign are
positive
negative)
Adding a positive and a negative
number
(Subtract numbers and take the
number with the larger absolute
value
Absolute Value – The number of
spaces an integer is away from
zero.
1) 2 + -7
7-2
2) 5 + 3
8
3) -4 + -8
4) 9 + -5
4+8
9-5
5
12
4
-5
-12
*A negative sign
is the same as
subtraction
9 + -5 = 9 - 5
5) -12 + 2
12 - 2
10
-10
1
2
If just subtraction sign,
squeeze in an addition sign to
the left.
3
If subtraction sign AND negative
(double negative), merge to
1) -3 - 7
2) 1 - -8
3) -7 - -7
-3 + -7
1+8
-7 + 7
3+7
9
10
0
-10
4) 5 - -5
5) 8 - 10
6) 0 - 7
5+5
8 + -10
0 + -7
10
-2
-7
IWBAT multiply and divide integers
Positive ×/÷ Positive = Positive
 Negative ×/÷ Negative = Positive
 Positive ×/÷ Negative = Negative
 Negative ×/÷ Positive = Negative

Same sign = positive
 Different sign = negative

1) 4 ∙ −1
2) 5 ∙ 11
4
3) −9 ∙ −3
55
27
−4
5) −60 ÷ −4
15
4) −20 ÷ 4
5
−5
6)
−15
5
−3
7)
−48
−12
4
IWBAT write and evaluate algebraic
expressions with integers
 Algebraic
Expression – a math sentence that
contain a variable but does not have an
equal sign
 Input Table – A table that gives you numbers
to input (substitute) and results in a
patterned output
n
5 – 3n
2
-1
-4
1) 5 – 3(2)
5–6
-1
2) 5 – 3(-1)
5 – (-3)
5+3
8
3) 5 – 3(-4)
5 – (-12)
5 + 12
17
n
5 – 3n
2
-1
-1
8
-4
17
x
2x
-1
0
2
1) 2(-1)
-2
2) 2(0)
0
3) 2(2)
4
x
2x
-1
-2
0
0
2
2
x
3x - 2
2
-2
-3
1) 3(2) - 2
6–2
4
2) 3(-2) - 2
-6 – 2
-6 + -2
-8
3) 3(-3) - 2
-9 – 2
-9 + -2
-11
x
3x - 2
2
4
-2
-8
-3
-11
```