Master the Cambridge IGCSE Business Studies (0450) exam with this examiner-guided kit. Learn how to secure vital application marks, structure perfect 12-mark strategic decisions, avoid the trap of mirror arguments, and perform flawless financial calculations.
A silent scientific calculator may be used on papers where calculators are permitted (some papers are non-calculator). It must not be graphical or programmable and must hold no stored information.
AO1: AO1: Knowledge and understanding (30%)
AO2: AO2: Application (30%)
AO3: AO3: Analysis (20%)
AO4: AO4: Evaluation (20%)
根據歷屆試題與評分準則整理（2023–2025）。
計算機程式
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
用途: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使用時機: Solving or sketching a function when you want to find where its graph crosses or turns.
步驟
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
考試提示: Allowed on papers where a calculator is permitted; use a silent scientific calculator with no stored content and show your method.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
用途: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使用時機: Any data-handling, statistics, or required-practical analysis question.
步驟
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
考試提示: Allowed on papers where a calculator is permitted; use a silent scientific calculator with no stored content and show your method.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
用途: Keep full-precision intermediate values to avoid rounding errors.
使用時機: Multi-step calculations where premature rounding loses the final accuracy mark.
步驟
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
考試提示: Allowed on papers where a calculator is permitted; use a silent scientific calculator with no stored content and show your method.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
用途: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使用時機: As a check only, after solving by hand.
步驟
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
考試提示: Allowed on papers where a calculator is permitted; use a silent scientific calculator with no stored content and show your method.
常見錯誤
1high涉及分數: 2Types of business organisation
Stating general or vague definitions for key terms like 'specialisation', 'job description', or 'current liabilities' rather than precise syllabus-defined attributes.
如何避免: Memorize exact textbook definitions. For example, ensure 'current liabilities' includes the specific time element ('debts to be paid back in less than one year').
2high涉及分數: 2Recruitment, selection and training of employees
Using 'mirror arguments' in evaluation or comparative questions (e.g., stating 'on-the-job training is cheap' while 'off-the-job training is expensive') which only secures one mark.
如何避免: Identify unique, separate benefits or limitations for each option instead of simply stating the exact opposite point.
3medium涉及分數: 4Cash-flow forecasting and working capital
Confusing 'cash flow' with 'profitability' by analyzing cash flow forecasts as if negative net positions indicate business costs or inefficiencies.
如何避免: Clearly distinguish that cash flow is about liquidity and timing of cash movements, whereas profit is the long-term surplus of revenues over expenses.
4high涉及分數: 6Analysis of accounts
Omitting calculations in Paper 2 strategic decision questions (e.g. Q2b) even when the prompt explicitly requests 'suitable calculations' (like break-even or financial ratios).
如何避免: Always calculate relevant figures (such as break-even point: Fixed Costs / Contribution, or Current/Acid-Test ratios) from the data provided in the Appendices.
5medium涉及分數: 2Financial information and decisions
Forgetting to write down the scale units (e.g., 'million' or '$') or ratio formats (e.g., writing '1.25' instead of '1.25:1' for current ratio), leading to a penalty.
如何避免: Always check your final numerical answers and ensure they are written with correct units, percentage signs, or mathematical formats as expected by examiners.
6medium涉及分數: 3Motivating employees
Treating Herzberg's hygiene factors (like wages or working conditions) as motivators that will increase long-term employee productivity.
如何避免: Analyze hygiene factors as elements that only prevent job dissatisfaction, while job enrichment, recognition, and responsibility act as actual motivators.
7medium涉及分數: 2Financial information and decisions
Failing to write down formulas or method steps when performing calculations, resulting in zero marks if the final arithmetic answer is incorrect.
如何避免: Always write down the formula explicitly before inserting the figures. This guarantees method marks even if you make a calculation error.
8high涉及分數: 4Business and the international economy
Failing to provide a comparative justification in 12-mark recommendation questions, simply summarizing the benefits without explaining why alternative options were rejected.
如何避免: In your final paragraph, write a direct comparison stating why your chosen option is superior to the other option, actively justifying why the rejected option is less suitable.