To multiply matrices, take each row of the first matrix and "pair up" with each column of the second - multiply matching positions and add. It's like calculating a total bill: (quantity × price) added up across every item.
Example: [[1,2]] × [[3],[4]] = [1×3 + 2×4] = [11]
Note: the number of columns in the first matrix must equal the number of rows in the second.
How was the lesson? Discuss Lesson
Multiply [[2,1]] × [[3],[5]].Multiply [[1,0],[0,1]] × [[4,2],[1,3]] and comment on the result.Multiply [[2,3],[1,4]] × [[1,0],[2,1]].
View Exercise Submit Exercise