This document provides an introduction to spreadsheet modeling and formulas. It defines a formula as an expression relating cells, and gives examples of formulas for addition and multiplication. It then provides an example of using the subtraction formula to calculate savings by taking the difference of amounts in two cells and writing the formula as =SUM(B11-C11). Finally, it instructs the reader to open Lesson Three and work through tasks, with some starter formulas provided.

1. Lesson Three
SPREADSHEET MODELLING

2. What is a formula?
What is a cell?
What is the formula for addition?
What is the formula for multiplication?
PRIOR KNOWLEDGE

3. A formula is an expression that defines how one cell relates to other cells.
FORMULA FOR SUBTRACTION
We want to work out the
amount of money Terry
saves per week.
So that’s 2.00 – 1.65
Or, cells: B11 – C11
As a formula it becomes: =SUM(B11-C11)

4. Open Lesson Three on the spreadsheet modelling site.
Work your way through the tasks.
Some formulae have been provided at the top of each lessons page.
YOUR TURN