Module_01
INTEGERS &
NEGATIVES
Numbers don't stop at zero. Just like you can go underground or owe money, numbers can go negative. An integer is any whole number, positive or negative, including zero.
Real World Context
Negative numbers aren't imaginary. We use them every day:
- Temperature: -10°C is colder than 0°C.
- Money: If you have $5 and spend $10, you have -$5 (Debt).
- Elevation: Death Valley is -86m (Below Sea Level).
+
The Double Negative Rule
-
+-
=+
"Subtracting a negative is like removing a debt. You get richer!"
x
Absolute Value
Distance from zero. Distance is always positive.
|-5| = 5
Interactive Lab
Elevator Logic
Equation
0+3=3
Start Floor0
Action Value3
10
9
8
7
6
5
4
3
2
1
0
-1
-2
-3
-4
-5
-6
-7
-8
-9
-10
0
Cheat Sheet: Multiplication
Pos × Pos
= Pos
Neg × Neg
= Pos
Pos × Neg
= Neg
Neg × Pos
= Neg
If the signs are the same, the answer is positive. If they are different, it's negative!
Verification Protocol
Knowledge Check: Negatives1 / 3