Vocab
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 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