1. Add and subtract matrices. Multiply by a matrix scalar.

2. Add or subtract matrices ◦ Must be the same dimensions. ◦ Add/subtract corresponding elements and write the answer in the corresponding element in the answer matrix. 4 01 8 -1 37 -2

3. 3-742910 12 504 -637 1) A + B2) B + C 3) C - B4) B - C

4. Scalar multiplication When a matrix is multiplied by a constant. How ◦ Each element is multiplied by the constant, similar to the distributive property.

5. 7-41021 -2 6-9-13 05 -711 1) 2A2) -1B 3) -4A

6. Commutative Property of Addition A + B = B + A Associative Property of Addition (A + B) + C = A + (B + C) Distributive Property c(A + B) = cA + cB Note c is a constant

7. 3-2 5 4 -13 05 -711