Chapter 4Chapter 4Chapter 4Chapter 4

Negative NumbersNegative Numbers

Learning Objectives• Order numbers• Subtracting a larger number from a

smaller number• Adding negative numbers• Subtracting negative numbers• Multiplying negative numbers• Dividing negative numbers

Directed Numbers

-3 -2 -1 0 1 2 3 4 5

Directed Numbers• Adding/ Subtracting

Note: Move up and down

number line.If two signs side-by-side

replace with a single sign.

If signs different replace with –

If signs same replace

with +

Examples1. 2 + (-6)2. 30 – 20 + 10 –

503. -10 – (-6) + 44. 3 + (+3) + (-9)

Directed Numbers• Multiplying/ DividingNote:

Do sign 1st

- if signs same answer is positive- if signs different answer is negative

Then do multiplication/ division

• Examples1. (-7) × (3)2. 8 × (-10)3. (-5) × (+3) ×

(+4)4. (+24) ÷ (-3)5. (-30) ÷ (-6)