View
101
Download
1
Category
Preview:
DESCRIPTION
How to add/subtract signed numbers using red/white chips
Citation preview
WHAT ARE THEY?
EXAMPLES: NOT AN INTEGER:
• -5
• 5
• 386
• -5843
• -5.3
• 5.3
• 386/387
SO WHAT DO YOU THINK AN INTEGER IS?.......
INTEGER “CHIPS”
YELLOW IS POSITIVERED IS NEGATIVE
When they come together, they
Become a zero pair – meaning they
equal zero
ADDING WITH CHIPS:
-5 + -3
ADDING WITH CHIPS:
NOTICE NO ZERO
PAIRS
ADDING WITH CHIPS:
WE HAVE 8 RED
CHIPS ALTOGETHER
ADDING WITH CHIPS:
8 RED CHIPS =
8 NEGATIVE CHIPS
= -8
ADDING WITH CHIPS:
-5 + 3
ADDING WITH CHIPS:
NOTICE WE CAN
CREATE ZERO
PAIRS
These will
cancel out
ADDING WITH CHIPS:
LEAVING
ONLY THESE
2 red chips =
2 negative chips =
-2
YOUR TURN!
WHICH ONE OF THESE REPRESENTS 5 + -7
A
or
B
WHAT IS THE CORRECT ANSWER?
12 -12 2 -2
Recommended