Vocab
What is absolute value?
The distance from zero (positive or negative)
6+(-4)
2
|-9| + |10| =
19
7 - 10
-3
When is Mrs. Capozzi's birthday?
9/27
What is an integer?
A positive and negative number
-3+2
-1
|15| - |-4| =
11
-5 - 7
-12
How many days are there in one year?
365 days
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
How many students are in the 8th grade?
16
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, Change
-20 + 3
-17
|-10| + |-6| =
16
-7 - 10
-17
There are 22 students in 7th grade, 11 in 7B. How many in 7A?
11
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
17