1.2 Matrices

• determine the position of elements and order of a matrix in various scenarios
• perform addition and subtraction of compatible matrices
• multiply matrices by a scalar in different situations
• perform combined operations on matrices in real life situations
• embrace the use of matrices in real life situations

“How are matrices used in everyday life?”

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1. Matrices all around us
   40 min · 1 practice tasks · quiz
   Recognise a matrix as a rectangular array of objects or numbers in rows and columns.
2. Elements and the order
   40 min · 1 practice tasks · quiz
   State the order of a matrix and write an element using its row and column.
3. Adding matrices
   40 min · 1 practice tasks · quiz
   Add compatible matrices by adding elements in matching positions.
4. Subtracting matrices
   40 min · 1 practice tasks · quiz
   Subtract compatible matrices by subtracting elements in matching positions.
5. Multiplying by a scalar
   40 min · 1 practice tasks · quiz
   Multiply every element of a matrix by the same number.
6. Combined operations
   40 min · 1 practice tasks · quiz
   Carry out addition, subtraction and scalar multiplication in one expression.
7. Matrices in real life
   40 min · 1 practice tasks · quiz
   Use matrices to store stock and combine two sets of figures.
8. Review and problem solving
   40 min · 1 practice tasks · quiz
   Consolidate order, addition, subtraction, scalar multiplication and combined operations.