adding integers using number chips
TRANSCRIPT
WELCOME TO …
Ms. Herzog’s
IntegersLesson!
What is an integer???
Any whole number. It can be positive or negative.
ANSWER
Adding Integers!
Examples:
2, -5, 245, 0, 9, -1,399
How do we add positive and negative integers?
Think in terms of number chips
Example: We can think of 4 as four positive chips
+4
How do we add positive and negative integers?
Think in terms of number chips
Another example: We can think of -3 as three negative chips
-3
How do we add positive and negative integers?
Think in terms of number chips
Another example: We can think of -8 as eight negative chips
-8
How do we add positive and negative integers?
Think in terms of number chips
Another example: We can think of 6 as six positive chips
+6
Let’s do an example!
Use number chips!
4 + 7
ANSWER+4
+7 11
Let’s do an example!
Use number chips!
-2 + 5
ANSWER
+5 3-2
One negative chip and one positive chip cancel!
Let’s do an example!
Use number chips!
3 + (-5)
ANSWER+3
-2One negative chip and one positive chip cancel!
-5
Let’s do an example!
Use number chips!
-8 + 5
ANSWER
-3One negative chip and one positive chip cancel!
-8+5
Let’s do an example!
Use number chips!
-3 + (-5)
ANSWER
-8There are no chips to cancel!
-5-3
-3 + (-8)
-11ANSWER
-3
-8
Number Chips!
4 + (-5)
-1ANSWERNumber Chips!
+4-5
-3 + 9
6ANSWERNumber Chips!
-3+9
You Try!
1. (-1) + (3) 6. (-7) + (1)
2. (4) + (-5) 7. (2) + (-3)
3. (10) + (-7) 8. (-3) + (-5)
4. (-2) + (-3) 9. (2) + (-1)
5. (-5) + (2) 10. (-2) + 1