Integers
-number lines
-integer chips (red=positive blue=negative)
-zero pair
-negative and positive numbers
**When subtracting something that isn't there use a zero pair.
-3-(-7)
-3 -7
-3+7
Chapter 2
Multiplying Integers
(-2)x(-3)= 6
remove 2 groups of negative 3
(-2)x(+3)= -6
(+2) x (-3)= -6
2 groups of negative 3
(+2) x (+3)=6
*Sign Rule (negative sign)*
Even= when you have an even number of Negative factors product is POSITIVE
Odd= When you have and Odd number of negative factors the product is NEGATIVE
Chapter 3 Dividing Integers
Partitive division is how many groups of a number are in a given value.
example:
6÷2=3
-6÷ (-2)= 3
Quotative Division is sharing a certain number between a given value.
Example of sign rule.
6/2= 3
no (-) signs which means its a positive
-6/(-2)= 3
2 (-) signs which means its a positive
(-6)÷2= -3
1 (-) sign which means its a negative
6÷(-2)= -3
1 (-) sign which means its a negative.
Chapter 4 Order of Operations with Integers
Order of operation
(+5) x (-3) + (-6) ÷ (+3)=
[(+5) x (-3)]= -15
(-15) + (-6) ÷ (+3)
[(-6) ÷ (+3)]= -2
(-15) + (-2) = -17
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