📚 AS Edexcel Accounting: Unit Test Mock Paper Walkthrough | AS Edexcel 会计：单元测试模拟卷解析
This article provides a detailed analysis of a typical AS Edexcel Accounting unit test. Each section tackles a past-paper style question, covering source documents, double-entry, trial balances, adjustments for accruals and depreciation, bad debts, correction of errors, financial statement preparation, and ratio interpretation. Use this walkthrough to identify common pitfalls and strengthen your exam technique.
本文对一份典型的 AS Edexcel 会计单元测试进行详细解析。每个小节处理一道模拟考题，涵盖原始凭证、复式记账、试算平衡、应计与折旧调整、坏账、差错更正、财务报表编制以及比率解读。通过这套解析，找出常见失分点，强化应试技巧。
1. Source Documents and Books of Prime Entry | 原始凭证与原始记录簿
Mock question: ‘A business sells goods on credit to Lee & Co. Which source document must be issued, and in which book of prime entry is the transaction first recorded?’ The correct answer is a sales invoice, first entered in the sales day book (sales journal). A credit note is used for returns, while a purchase invoice records purchases.
模拟题：“企业向 Lee & Co. 赊销商品。必须出具哪种原始凭证，该交易首先记录在哪本原始记录簿中？”正确答案是销售发票，首先记入销售日记账（销售日记簿）。退货使用贷项通知单，购货则凭购货发票记录。
Examiners frequently test the link between source documents and books of prime entry. All credit sales are listed in the sales day book before posting to the sales ledger and general ledger. Remember that the cash book serves as both a book of prime entry and a ledger account for cash and bank transactions. Common mistakes include confusing delivery notes with invoices or placing cash sales into the sales day book.
考官经常考查原始凭证与原始记录簿之间的联系。所有赊销先列入销售日记账，再过账至销售分类账和总账。请注意，现金簿既是原始记录簿，又是现金和银行存款的分类账户。常见错误包括将发货单与发票混淆，或将现金销售误记入销售日记账。
2. Double-Entry Bookkeeping and Ledger Accounts | 复式记账与分类账户
A question may ask: ‘Record the purchase of a motor vehicle for $18,000, paying by cheque.’ The double-entry is debit Motor Vehicles account (non-current asset), credit Bank account. If a part-exchange is involved, the old asset’s carrying amount is eliminated and any trade-in allowance is credited, with the balancing figure posted to the Disposal account.
题目可能为：“记录以支票购入一辆汽车，价格 18,000 美元。”复式分录为：借记汽车账户（非流动资产），贷记银行存款账户。若存在以旧换新，须冲销旧资产账面价值，并将折价额贷记，差额记入资产处置账户。
In ledger accounts, the motor vehicles account would show the cost on the debit side. Any subsequent depreciation is credited to Accumulated Depreciation. Ensure you understand the classification: carriage inwards on raw materials is debited to Purchases (cost of goods sold), while carriage outwards is a selling expense.
在分类账中，汽车账户的借方反映成本。后续折旧贷记累计折旧。务必掌握分类：原材料运入运费借记购买（销售成本），而运出运费属于销售费用。
3. Trial Balance and Types of Errors | 试算平衡表与错误类型
Suppose a trial balance shows a debit total of $98,450 and a credit total of $98,270. The difference of $180 could arise from a one-sided entry. The question might provide a list of errors: a sales invoice of $90 was completely omitted; a purchase of $180 was recorded as $810 in both accounts. Which error causes the trial balance disagreement? Only an error where debits do not equal credits affects the trial balance.
假设试算平衡表借方合计 98,450 美元，贷方合计 98,270 美元。差额 180 美元可能源于单边分录。题目可能列出一组错误：一张 90 美元的销售发票完全漏记；一笔 180 美元的购货在两个账户中均误记为 810 美元。哪种错误导致试算表不平？只有当借方不等于贷方的差错才会影响试算平衡。
Errors of complete omission, commission, principle, and compensating errors do not cause trial balance disagreement. A transposition error ($180 written as $810) in both accounts still keeps debit = credit. Only a one-sided entry, an arithmetic error in the trial balance itself, or posting different amounts to debit and credit creates a difference. A suspense account is opened to force the trial balance to agree while the error is investigated.
完全漏记、记错账户、原则性差错和抵销错误都不会造成试算表不平衡。在两个账户中均将 180 写成 810 的换位错误仍使借、贷相等。只有单边记账、试算表本身的计算错误或借贷方金额不同才会产生差额。调查错误期间，会开设暂记账户强制试算平衡。
4. Accruals and Prepayments | 应计与预付
A typical adjustment: ‘At the year-end, rent prepaid amounts to $2,000 and wages accrued are $3,500.’ Rent expense must be reduced by the prepayment, while wages expense must be increased by the accrual. The double-entry: debit Prepaid Rent (current asset), credit Rent Expense; debit Wages Expense, credit Accrued Wages (current liability).
典型调整题：“年末预付租金 2,000 美元，应付未付工资 3,500 美元。”租金费用须减去预付额，工资费用须加上应计额。复式分录为：借记预付租金（流动资产），贷记租金费用；借记工资费用，贷记应付工资（流动负债）。
In the income statement, only the expense incurred during the period is charged. The statement of financial position shows prepayments under ‘other receivables’ and accruals under ‘trade and other payables’. Reverse the opening accrual at the start of the next period unless the business uses the prepaid/accrued accounts method consistently.
利润表中仅列支本期发生的费用。财务状况表中，预付项目列于“其他应收款”下，应计项目列于“应付账款及其他应付款”下。下期期初须冲回期初应计，除非企业一贯使用预付/应计账户法。
5. Depreciation of Non-Current Assets | 非流动资产折旧
Given a machine costing $80,000, with residual value $8,000 and a useful life of 6 years, calculate the annual straight-line depreciation and the carrying amount after 2 years. The straight-line charge is:
Annual Depreciation = (80,000 − 8,000) ÷ 6 = $12,000
Carrying amount after 2 years = 80,000 − (12,000 × 2) = $56,000. If the reducing balance method at 25% is used, year 1: 80,000 × 25% = 20,000; year 2: (80,000 − 20,000) × 25% = 15,000; carrying amount = 45,000.
给定机器成本 80,000 美元，残值 8,000 美元，使用年限 6 年，计算直线法年折旧额及 2 年后的账面净值。直线法折旧额如上。2 年后账面净值 = 80,000 − (12,000 × 2) = 56,000 美元。若采用 25% 余额递减法，第 1 年：80,000 × 25% = 20,000；第 2 年：(80,000 − 20,000) × 25% = 15,000；账面净值 = 45,000。
Depreciation is charged to the income statement and credited to accumulated depreciation. When an asset is disposed of, the cost and accumulated depreciation are transferred to a Disposal account. Any gain or loss on disposal is taken to the income statement. Remember that land is not depreciated unless it is a quarry or mine.
折旧计入利润表，贷记累计折旧。处置资产时，成本和累计折旧转至处置账户。处置利得或损失列入利润表。注意，除非是采石场或矿场，土地不计提折旧。
6. Bad Debts and Provision for Doubtful Debts | 坏账与呆账准备金
Question: ‘A business has trade receivables of $45,000. It decides to write off a $3,000 debt as irrecoverable and create a provision for doubtful debts of 5% on the remaining receivables. Show the journal entries.’ The bad debt is debited to Bad Debts Expense and credited to Trade Receivables. The provision required is (45,000 − 3,000) × 5% = $2,100.
题目：“企业应收账款 45,000 美元。决定将一笔 3,000 美元的债务作为坏账冲销，并按剩余应收账款的 5% 计提呆账准备金。请编制分录。”坏账冲销借记坏账费用，贷记应收账款。所需准备金为 (45,000 − 3,000) × 5% = 2,100 美元。
If an existing provision of $800 is on hand, the income statement charge is the increase: $2,100 − $800 = $1,300. Journal: debit Bad Debts Expense $1,300, credit Provision for Doubtful Debts $1,300. The net realizable value of receivables in the statement of financial position is $45,000 − $3,000 − $2,100 = $39,900. The provision is deducted from trade receivables.
若已有准备金 800 美元，利润表计提额为增加数：2,100 − 800 = 1,300 美元。分录：借记坏账费用 1,300，贷记呆账准备金 1,300。财务状况表中应收账款的可变现净值为 45,000 − 3,000 − 2,100 = 39,900 美元。准备金须从应收账款中扣除。
7. Correction of Errors and the Suspense Account | 差错更正与暂记账户
A trial balance reveals a suspense account of $720 debit. On investigation, the following errors are found: (i) a payment of $360 for stationery was debited to the stationery account as $630; (ii) a sale of $500 to J. Smith was credited to J. Smythe’s account. Show the necessary corrections.
试算平衡表显示有一个暂记账户，借方余额 720 美元。经查发现以下错误：(i) 支付文具费 360 美元，误借记文具账户 630 美元；(ii) 对 J. Smith 的销售 500 美元误记入 J. Smythe 账户的贷方。请做出更正分录。
For error (i), the stationery account is overstated by $270 (630 − 360). The correction is to credit stationery with $270 and debit suspense with $270. For error (ii), debit J. Smythe $500 to cancel the wrong credit, and credit J. Smith $500. These entries clear the suspense account if the remaining balance is zero after all corrections.
对于错误 (i)，文具账户多计 270 美元 (630 − 360)。更正分录：贷记文具 270，借记暂记账户 270。错误 (ii)：借记 J. Smythe 500 以冲销错误贷方，贷记 J. Smith 500。所有更正后若暂记账户余额为零，则错误全部被纠正。
8. Preparation of Income Statement | 利润表的编制
Using the adjusted trial balance, construct an income statement for the year. Key points: sales are recorded net of returns; cost of sales includes opening inventory + purchases (net) − closing inventory. Edexcel typically uses ‘cost of sales’ rather than ‘cost of goods sold’. Below is a simplified layout:
利用调整后试算平衡表编制年度利润表。关键点：销售按退货净额列示；销售成本包括期初存货 + 采购（净额）− 期末存货。Edexcel 通常使用“销售成本”而非“销货成本”。简化格式如下：
| Revenue (Sales − Returns) | X |
| Cost of Sales: Opening Inventory + Purchases − Closing Inventory | (X) |
| Gross Profit | X |
| Add Other Income | X |
| Less Expenses (e.g., wages, rent, depreciation, bad debts) | (X) |
| Profit for the Year | X |
Expenses must include any accruals, prepayments, and non-cash items like depreciation. Carriage inwards is added to purchases in cost of sales, while carriage outwards is a distribution cost. Incomplete records may require constructing the income statement via the accounting equation or markup/margin methods.
费用必须包含应计、预付和折旧等非现金项目。购货运费计入销售成本中的采购，销货运费则为配送费用。不完整记录中可能需要通过会计等式或成本加成/毛利率法来编制利润表。
9. Statement of Financial Position Adjustments | 财务状况表调整
The statement of financial position (balance sheet) must classify assets and liabilities as current or non-current. Non-current assets are shown at carrying amount (cost − accumulated depreciation). Inventory is valued at the lower of cost and net realisable value (IAS 2). Trade receivables are shown net of provision for doubtful debts.
财务状况表（资产负债表）须将资产和负债分类为流动和非流动。非流动资产按账面净值（成本 − 累计折旧）列示。存货按成本与可变现净值孰低计价（IAS 2）。应收账款以扣减呆账准备金后的净额列示。
Equity includes capital plus retained earnings (profit for the year less drawings). A typical adjustment question might provide a partially completed balance sheet with missing figures for trade payables or accruals. Use the accounting equation: Assets = Liabilities + Capital. If the profit figure has been calculated correctly, the statement of financial position should balance.
权益包括资本加留存收益（本年利润减提款）。典型的调整题可能提供部分完成的资产负债表，缺失应付账款或应计项目数字。运用会计等式：资产 = 负债 + 资本。若利润数字计算正确，财务状况表应当平衡。
10. Ratio Analysis and Interpretation | 比率分析与解读
From the financial statements, compute: gross profit margin, profit margin, return on capital employed (ROCE), current ratio, quick ratio, and trade receivables days. For example: Gross profit margin = (Gross Profit ÷ Revenue) × 100%. A decline in margin may indicate increased purchase costs or discounting.
根据财务报表计算：毛利率、利润率、已用资本回报率 (ROCE)、流动比率、速动比率和应收账款周转天数。例如：毛利率 = (毛利 ÷ 收入) × 100%。毛利率下降可能表明采购成本上升或打折销售。
Interpretation is crucial: a current ratio of 2:1 is generally healthy, but too high a ratio might imply poor management of working capital. Trade payables days = (Trade Payables ÷ Credit Purchases) × 365. Comparing ratios with industry averages and previous years gives insight into liquidity, profitability, and efficiency.
解读至关重要：流动比率 2:1 通常健康，但过高可能暗示运营资本管理不善。应付账款周转天数 = (应付账款 ÷ 赊购额) × 365。将比率与行业平均值和往年比较，可了解流动性、盈利能力和效率。
In the exam, always refer to the specific business context. For instance, a supermarket may have a low current ratio due to fast inventory turnover, while a manufacturer might require higher inventory and receivables levels. Identify whether the calculated ratio is a strength or a weakness and suggest practical improvements.
考试中务必结合具体企业背景解读。例如，超市因存货周转快，流动比率可能较低，而制造商可能需要较高的存货和应收账款水平。指出计算出的比率是优势还是劣势，并提出切实可行的改进建议。
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