1. Subtracting Integers: integer tiles, number line, & rules

2. Subtracting Integers Using Counters
If subtracting a negative from a negative or a positive from a positive:
Put down enough counters to represent 1st number
remove the required number of tiles indicated by 2nd number
Example: (-5) – (-2)
= -3
Example: (+5) – (+2)
= +3

3. Subtracting Integers Using Counters
If subtracting a negative from a positive or a positive from a negative:
Put down enough counters to represent 1st number
Add enough zero pairs to have enough to be able to take away the 2nd number
Example: (-5) – (+2)
= -7

4. Subtracting Integers Using a Number Line
Start at the 2nd number draw an arrow towards the 1st number:
Distance between the 2 #s = answer
Direction of arrow = sign
Examples:
(-15) – (-20)
= +5
(-20) – (+15)
= -35

5. Subtracting Integers by Adding the Opposite
Change question by turning subtraction question into addition question
Leave 1st number the same
Change – between numbers to +
Change sign of 2nd # to opposite of what it is
Follow adding integer rules
1st # opposite of 2nd #
Example:
(+3) – (-2) becomes:
(+3) + (+2)
= +5
(-7) – (+3) becomes:
(-7) + (-3)
= -10

6. Subtracting Integers by Adding the Opposite
Forget KFC
Remember KCF
Keep 1st integer
Change the subtraction to addition
Flip the sign on 2nd integer

7. Integer Addition & Subtraction Rap
W9FolSnc

8. Integer Subtraction Practice
Pg #s 3-5 & 7