Vocab
What is absolute value?
The distance from zero (positive or negative)
6+(-4)
2
|-9| + |10| =
19
7 - 10
-3
1/6 + 4/6
5/6
What is an integer?
A positive and negative number
-3+2
-1
|15| - |-4| =
11
-5 - 7
-12
4/12 + 3/12 =
7/12
Explain the rule for adding integers
If the signs are the same, you can add. If they are opposite, you subtract
-5+ (-6)
-11
|4| + |9| =
6- (-4)
10
3/4 + 2/4 =
5/4 or 1 1/4
Explain the rule for subtracting integers
You must first flip the subtraction equation to addition and change the 2nd integer to its opposite.
Keep, Change, Flip
-20 + 3
-17
|-10| + |-6| =
16
-7 - 10
-17
1/2 + 4/10
9/10
When subtracting integers, how do you know if your answer will be positive or negative?
keep the sign of the biggest (absolute value) number
-12 + (-4) + (-3)
-19
-|15| + |-10| =
-5
-4 - (-6) - 2
0
4/5 + 1/2
13/10 or 13/10