Learning Resource Type

Learning Activity

Adding, Subtracting, and Multiplying Matrices

Subject Area

Mathematics

Grade(s)

9, 10, 11, 12

Overview

This learning activity will be used at the end of a lesson on adding, subtracting, and multiplying matrices of appropriate dimensions./p>

This activity results from the ALEX Resource Development Summit.

    Mathematics (2019) Grade(s): 09-12 - Algebra II with Statistics

    MA19.A2.4

    Add, subtract, and multiply matrices of appropriate dimensions.

    Unpacked Content

    UP:MA19.A2.4

    Vocabulary

    • Appropriate dimensions

    Knowledge

    Students know:

    • The aspects of a matrix with regard to entries, rows, columns, dimensions, elements, and subscript notations.

    Skills

    Students are able to:

    • Strategically choose and apply appropriate representations of matrices on which arithmetic operations can be performed.

    Understanding

    Students understand that:

    • Matrix addition and subtraction may be performed only if the matrices have the same dimensions.
    • Matrix multiplication can be performed only when the number of columns in the first matrix equal the number of rows in the second matrix.
    • There are many contextual situations where arithmetic operations on matrices allow us to solve problems.

    Body

    1. Add, subtract, and multiply matrices of appropriate dimensions.

    Phase

    After/Explain/Elaborate
    Learning Objectives

    Learning Objectives

    I can add matrices of appropriate dimensions.

    I can subtract matrices of appropriate dimensions.

    I can multiply matrices of appropriate dimensions.

     

    Activity Details

    This activity will be used at the end of a lesson on complex numbers. Students will complete the activity Adding Subtracting, and Multiplying Matrices.  This activity is a final check for students on the mastery of adding, subtracting, and multiplying matrices. Students will complete this activity individually.

    Assessment Strategies

    Assessment Strategies

    The activity Adding Subtracting, and Multiplying Matrices can be used to assess the student's ability to add, subtract, and multiply matrices of appropriate dimensions.

    Variation Tips

    The learning activity Adding Subtracting, and Multiplying Matrices can be shortened to use the questions as exit slips.

    Background and Preparation

    Background / Preparation

    Students will need to know how to add, subtract, and multiply matrices of appropriate dimensions. The teacher can add the activity to Google Classroom for the students to view.  The teacher can copy the activity Adding Subtracting, and Multiplying Matrices for the students to write on and turn in.

    Digital Tools / Resources

    ALSDE LOGO