Be able to use arithmetic operators in formulae including add, subtract, multiply, divide, indices
📊 20 Spreadsheets – Arithmetic Operators
Objective
Be able to use arithmetic operators in formulae, including add, subtract, multiply, divide, and indices (exponents).
Arithmetic Operators – The Basics
- ➕ Add –
A1 + B1adds the values in cells A1 and B1. - ➖ Subtract –
C1 - D1subtracts D1 from C1. - ✖️ Multiply –
E1 * F1multiplies E1 by F1. - ➗ Divide –
G1 / H1divides G1 by H1. - 🔢 Indices (Exponentiation) –
I1 ^ 2squares the value in I1.
Using Operators in Formulae – An Analogy
Think of a spreadsheet like a recipe book. Each cell is an ingredient, and the formula is the cooking step that combines them.
For example, if A1 is the number of apples (🍎) and B1 is the number of oranges (🍊), then A1 + B1 gives you the total fruit count.
Indices (Exponentiation) – Power Up!
Indices let you raise a number to a power. It’s like a super‑power boost for your numbers.
Example: 3 ^ 4 means 3 multiplied by itself 4 times: $3^4 = 81$.
Practical Examples – Table of Formulae
| Formula | Description | Result (if A1=5, B1=3) |
|---|---|---|
| A1 + B1 | Add | 8 |
| A1 - B1 | Subtract | 2 |
| A1 * B1 | Multiply | 15 |
| A1 / B1 | Divide | 1.6667 |
| A1 ^ 2 | Square (index) | 25 |
Exam Tips – Quick Checklist
- 🔎 Check cell references – make sure you’re pointing to the right cells.
- 🧮 Order of operations – remember PEMDAS: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.
- 📐 Use parentheses for clarity – e.g.,
(A1 + B1) * C1. - ⚠️ Division by zero – always guard against it; use
IFERRORif needed. - 📝 Show your work – write out the formula in the answer sheet if required.
Practice Challenge
Suppose you have the following values:
- A1 = 12
- B1 = 4
- C1 = 3
Write a formula that calculates: multiply the sum of A1 and B1 by C1, then square the result.
Answer: ((A1 + B1) * C1) ^ 2 → $((12+4)*3)^2 = 576$.
Revision
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