E-Math: Order of Matrix


Another Tip for students taking GCE O Level Elementary Math (E-Math):

Though order of Matrix is a rather small part of the chapter, it is still essential that you know how to list down the order of any matrix which will be used in operation of matrix.(Especially multiplication of matrix)

In this post, I will provide some tips on how to list down the order of any matrix which is the Number of Rows x Number of Columns.

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Hi, I'm Ai Ling Ong. I enjoy coaching students who have challenges with understanding and scoring in 'O' Level A-Maths and E-Maths. I develop Math strategies, sometimes ridiculous ideas to help students in understanding abstract concepts the fast and memorable way. I write this blog to share with you the stuff I teach in my class, the common mistakes my students made, the 'way' to think, analyze... If you have found this blog post useful, please share it with your friends. I will really appreciate it! :)

3 Responses to E-Math: Order of Matrix

  1. Hello

    I wanted to know how to determine the multiplication of matrices eg

    R2C2 X R2C1 = R2C1

    What about R2C1 X R2C2 =?

    Is there a way of figuring it our from Rows (R) and Columns (C)

    Thank you for your time

    Reply

    alwaysLovely Reply:

    Hi Sonia,

    For multiplication of matrices, you must first check the order of the 2 matrices.

    Order of matrix is No. of Rows x No. of Columns

    For example
    1st matrix : 1 x 2 2nd matrix: 2 x 3

    The 'inner' order which is 2 & 2 must match before you can multiply the matrices together.

    The 'outer' order which is 1 x 3 will be the order of your answer to this multiplication.

    I hope this is useful for you.

    Read more on multiplication of matrix here:
    http://www.singaporeolevelmaths.com/2009/01/31/e-math-how-to-multiply-matrix-know-your-rs-cs/

    Reply

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