ADDING AND SUBTRACTING MATRICES WORKSHEET

Use matrices A, B, C and D to find the following.

Problem 1 :

A + B

Solution

Problem 2 :

D - B

Solution

Problem 3 :

4C

Solution

Problem 4 :

6B - 2A

Solution

Problem 5 :

3C - 4A + B

Solution

Problem 6 :

C + 1/3D

Solution

Problem 7 :

Use the following information. The Cookie Cutter Bakery records each type of cookie sold at three of their branch stores. Two days of sales are shown in the spreadsheets below.

a. Write a matrix for each day's sales.

b. Find the sum of the two day's sales expressed as a matrix.

c. Find the difference in cookie sales from Friday to Saturday expressed as a matrix.

Solution