1. Bellwork Change to Addition
1.)
2.) 7 - (-2)
3.)
4.) -3 - (-5)
5.) 7 -(-3)
6.) 5 - 2
7.) -6 -(-9)
8.)

2. Bellwork Change to Addition
1.)
2.) 7 - (-2)
3.)
4.) -3 - (-5)
5.) 7 -(-3)
6.) 5 - 2
7.) -6 -(-9)
8.)

3. Change to Addition and Simplify
1.)
= 7
2.)
= - 26
3.) 27 -(-5)
= 32

4. Change to Addition and Simplify
4.) -16 -|-25|
= = -41
5.)
= -16
6.)
= -17

5. Change to Addition and Simplify
7.) -1/2 -1/4
-2/4 + -1/4 = -3/4
8.) 1/2 -1/4
2/4 + -1/4 = 1/4
9.) -1/2 -(-1/4)
-2/4 + +1/4 = -1/4

6. Change to Addition and Simplify
You don’t need to make the 2 marks if it is already +
10.) -5 - |12|
= = -17
11.) |-3| - |-3|
3 - 3 = = 0
12.) 4

7. Change to Addition and Simplify
13.) |-7| - 9
= -2
14.) |6| - (-5)
= 11
15.) (-2)
= -3

8. Closure #1
To change subtraction to addition, How many marks do you always make?
two

9. Closure #2
To change subtraction to addition, where do you make the marks?
Between the 2 numbers

10. To be able to add and subtract Matrices.
Today’s Objective
To be able to add and subtract Matrices.

11. A Matrix This is a 2 by 3 Matrix.
A matrix is a rectangular arrangement of numbers into rows and columns.
This is a 2 by 3 Matrix.

12. A Matrix
2 Rows and 3 Columns.

13. Adding Matrices 1.) -3 -2 6 -8 5 -7 -9 6
1.) + = 3
-10 -4 -1
Add the Corresponding parts of each matrix.

14. Subtracting Matrices 1.) -3 -2 6 -8 5 -7 -9 6
1.) - = -9 6 14
-13
Subtract the corresponding parts of each matrix.

15. Adding Matrices
Matrices Cannot be added if they don’t have the same # of Rows & Columns +

16. You try these 1.) -3 -2 6 -8 5 -7 -9 6 2.) 3 -7 4 -3 7 -1 7 8
1.)
2.)
3.) + = = + = -

17. You try these 1.) -3 -2 6 -8 5 -7 -9 6 2.) 3 -7 4 -3 7 -1 7 8
1.)
2.)
3.) = + = + = -

18. You try these
4.)
5.)
6.) = - = - = +

19. You try these 4.) 0 -3 -6 0 6 -3 -1 4 3 1 -4 -2 5.) 1 1 4 -3 -3 4
4.)
5.)
6.) = - = - = +

20. Classwork
Do Worksheet 2.4
Homework:
page 84 (5-18)