RocketDigitsStart free

All skills › Year 11 › Patterns & Algebra

Year 11 · Patterns & Algebra

Matrices

A matrix is a grid of numbers. Add matching entries, scale every entry, or multiply rows by columns.

Try a question

Loading a question…

How to do it

  1. Add: entry plus matching entry.
  2. Scalar: multiply every entry.
  3. Product: row of the first times column of the second. Determinant of [a b; c d] is ad − bc.

Worked example

What is the entry in row 2, column 2 of A + B?
Add the matching entries: 5 + (2) = 7.
Answer: 7

With a free account, these play as step-by-step animations.

Watch out
AB and BA are usually different.

Practise Matrices properly

Ten-question rounds with instant marking, a lesson under every question, stars and badges. Free to start, and the first week includes Premium.

Create a free account

More Patterns & Algebra skills