ACT Math : Other Matrices
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Example Questions
Example Question #3 : Matrices
Simplify:
Matrix addition is very easy! All that you need to do is add each correlative member to each other. Think of it like this:
Now, just simplify:
There is your answer!
Example Question #4 : Matrices
Simplify:
Matrix addition is really easy—don't overthink it! All you need to do is combine the two matrices in a one-to-one manner for each index:
Then, just simplify all of those simple additions and subtractions:
Example Question #21 : Matrices
What is the value of
You cannot add these two matrices because their indices do not line up.
To add matrices you simply add the numbers in the same position as each other.
Plugging the given values into the above formula, we are able to solve the question.
Example Question #1 : How To Subtract Matrices
Given the following matrices, what is the product of 
When subtracting matrices, you want to subtract each corresponding cell.
Now solve for 
Example Question #1 : Find The Sum Or Difference Of Two Matrices
If 
You can treat matrices just like you treat other members of an equation. Therefore, you can subtract the matrix
from both sides of the equation. This gives you:
Now, matrix subtraction is simple. You merely subtract each element, matching the correlative spaces with each other:
Then, you simplify:
Therefore,
Example Question #1 : How To Subtract Matrices
When subtracting matrices, subtracting component-wise.
Example Question #21 : Matrices
If 
26
3
15
0
12
15
Match each term from the first matrix with the corresponding number from the second matrix and subtract.
Simplify.
Each of the numbers in the matrix solution now corresponds to the letters, a through f. Add a (upper left) and f (lower right).
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