1. Applying Addition and Subtraction of Integers
Lesson 1.3 Day 2
Applying Addition and Subtraction of Integers

2. Introduction
We are going to simplify problems that have both addition and subtraction
Like this one:
– 8 – (-4)
Notice:
The addition stays the same
The subtraction needs to be turned into addition using KFC

3. Strategy Underline the numbers that can stay the same.
Circle the numbers that need to be changed. Remember to include the subtraction sign.
KFC the circled numbers.
Add all positive integers.
Add all negative integers.
Lastly, add integers.

4. Examples: A) -2 + 5 – 8 – (-4) -2 + 5 + (-8) + 4 9 + (-10) -1 K F C F

5. Examples: 5 5 + (-8) + (-9) + 4 + 7 4 +7 16 + (-17) 16 -1
B) 5 – 8 – – (-7) K F C F C F C 5 5
+ (-8)
+ (-9)
+ 4
+ 7 4 +7
16 +
(-17) 16 -1

6. Examples: C) -7 – 3 – (-8) + 5 + 6 – 9 -7 + (-3) + 8 + 5 + 6 + (-9)K F C F C F C -7
+ (-3)
+ 8
+ 5
+ 6
+ (-9)
19 +
(-19) 8 7 5 3 +6 +9 19
-19

7. Examples: D) 8 – 9 – (-11) – 4 + 6 – 1 + 6 8 + (-9) + 11 + (-4) + 6K F C F C F C F C 8
+ (-9)
+ 11
+ (-4)
+ 6
+ (-1)
+ 6 8
31 +
(-14) 9 11 6 4 17 +6 +1 31
-14

8. Homework
TB: Page 18 (27-32) all