Practice question · Sort into groups
Sort each business operation by the matrix operation it is.
Groups: Matrix addition · Scalar multiplication
- Merging two warehouses’ inventory counts
- Converting a cost table from thousands to units of €
- Combining Q1 and Q2 sales tables into a half-year total
- Budgeting each department at 120% of last year
- Raising every price in the catalog by 10%
Hints
- Ask whether two tables combine or one table is rescaled.
- A single multiplier applied throughout is not an addition.
Show the answer
Matrix addition: Combining Q1 and Q2 sales tables into a half-year total, Merging two warehouses’ inventory counts
Scalar multiplication: Raising every price in the catalog by 10%, Budgeting each department at 120% of last year, Converting a cost table from thousands to units of €
Why
Adding tables = matrix addition; rescaling one table by a single factor = scalar multiplication. Most spreadsheet habits are one of these two in disguise.
Practise Matrix Addition
The app has 7 more questions on this lesson, and keeps your place in the course. Business I is free to start.