1. Accentuate the Negative Investigation 2
Adding and Subtracting Integers

2. Algorithm – a set of rules for performing a procedure. Ex
Algorithm – a set of rules for performing a procedure. Ex. When dividing fractions, flip the second fraction and multiply.

3. 2.1 Introducing Addition of Integers Chip Model Practice
Same
Signs
= -8
1) = ?
ADDITION
ALGORITHM
EXAMPLE
Same Signs
Add values
Keep the sign
= 4
= -4
_______ Signs
______ values
Keep sign of the ______ number from zero
-3 + __ = -2
__ + -1 = 2

4. 2.1 Introducing Addition of Integers Chip Model Practice
Different
Signs
1) = ?
= 1
2) = ?
= -1

5. 2.1 Introducing Addition of Integers
ALGORITHM
EXAMPLE
Same Signs
Add values
Keep the sign
= 4
= -4
Different Signs
Subtract values
Keep sign of the farthest number from zero
= -2
= 2

6. ‘Addition’ Flap of Foldable
Left side
Same Signs
Add values
Keep the sign
Ex = 4
Ex = -12
Right side
Different Signs
Subtract values
Keep the sign of the number farthest from zero.
Ex = 1
Ex = -5