Failing to convert a final calculated answer back to correct standard form notation, leaving coefficients outside the valid 1 to 10 range (e.g., leaving 24 x 10^-2).

Always check that your final standard form coefficient A is between 1 and 10 (1 <= A < 10). Rewrite 24 x 10^-2 as 2.4 x 10^-1 by dividing the coefficient by 10 and adding 1 to the exponent.

Giving vague or purely verbal answers on explanation questions (such as spotting Rupa's bar chart errors or Callum's area conversions) without displaying numerical calculations or citing formal mathematical definitions.

Always show complete, step-by-step arithmetic or state the precise rule violated (e.g., 'He forgot to square the linear scale factor when converting area units') followed by a clear, concluding decision.

Calculating simple annual interest or decay and multiplying by the number of years instead of compounding step-by-step (e.g., over a 3-year period).

Use the exponential formula for compound growth/decay: Initial Value x (Multiplier)^n, or calculate the interest year-by-year, adding it to the principal before starting the next year.

Treating minutes as decimals directly in speed calculations (e.g., assuming 1 hour 45 minutes equals 1.45 hours).

Always convert minutes to decimal hours by dividing by 60 (e.g., 45 minutes / 60 = 0.75, so the total time is 1.75 hours) before applying speed/distance formulae.

Failing to write down precise, standard geometric terms for angle calculations, such as writing 'angles in a circle' instead of 'angles at a point add up to 360'.

Learn the exact, examiner-approved wording of core angle rules (e.g., 'angles on a straight line add up to 180' and 'angles at a point add up to 360') and write them out in full.

Rounding final values too early in multi-step proportional calculations (such as travel time or mean weights), leading to minor errors in the final answer.

Keep the full, unrounded value stored in your calculator memory until you calculate the final answer, then round to the requested degree of accuracy (e.g., 3 significant figures).

Misinterpreting the area scale factor for transformations or unit conversions, such as assuming 1 m^2 equals 100 cm^2.

Remember that the area scale factor is the square of the linear scale factor. Since 1 m = 100 cm, then 1 m^2 = (100)^2 cm^2 = 10,000 cm^2.

Edexcel GCSE · เคล็ดลับการสอบ

Mathematics (1MA1) เคล็ดลับการสอบ

Q: Giving vague or purely verbal answers on explanation questions (such as spotting Rupa's bar chart errors or Callum's area conversions) without displaying numerical calculations or citing formal mathematical definitions.

Always show complete, step-by-step arithmetic or state the precise rule violated (e.g., 'He forgot to square the linear scale factor when converting area units') followed by a clear, concluding decision.

Q: Calculating simple annual interest or decay and multiplying by the number of years instead of compounding step-by-step (e.g., over a 3-year period).

Use the exponential formula for compound growth/decay: Initial Value x (Multiplier)^n, or calculate the interest year-by-year, adding it to the principal before starting the next year.

Q: Treating minutes as decimals directly in speed calculations (e.g., assuming 1 hour 45 minutes equals 1.45 hours).

Always convert minutes to decimal hours by dividing by 60 (e.g., 45 minutes / 60 = 0.75, so the total time is 1.75 hours) before applying speed/distance formulae.

Q: Failing to write down precise, standard geometric terms for angle calculations, such as writing 'angles in a circle' instead of 'angles at a point add up to 360'.

Learn the exact, examiner-approved wording of core angle rules (e.g., 'angles on a straight line add up to 180' and 'angles at a point add up to 360') and write them out in full.

Q: Rounding final values too early in multi-step proportional calculations (such as travel time or mean weights), leading to minor errors in the final answer.

Keep the full, unrounded value stored in your calculator memory until you calculate the final answer, then round to the requested degree of accuracy (e.g., 3 significant figures).

Q: Misinterpreting the area scale factor for transformations or unit conversions, such as assuming 1 m^2 equals 100 cm^2.

Remember that the area scale factor is the square of the linear scale factor. Since 1 m = 100 cm, then 1 m^2 = (100)^2 cm^2 = 10,000 cm^2.

Master the Pearson Edexcel GCSE (9-1) Mathematics (1MA1) Foundation Tier with our expert examiner-backed guide. Discover how to pick up easy marks on early non-calculator drills, dodge rounding and time-unit conversion traps on Papers 2 and 3, and structure multi-step answers to maximize your process marks.

อ่าน 4 นาทีอัปเดตเมื่อ: 21 มิ.ย. 2569

ภาพรวมข้อสอบ

จำนวนฉบับ

คะแนนเต็ม

240

เวลาสอบ

4ชม. 30นาที

ประเภทคำถาม

ฉบับ	เวลา	คะแนน	จำนวนข้อ	น้ำหนักคะแนน	ประเภทคำถาม
Paper 1 (Non-Calculator)	1ชม. 30นาที	80	28	33.33%	Short Answer, Structured Problem Solving, Multi-Step Application
Paper 2 (Calculator)	1ชม. 30นาที	80	28	33.33%	Short Answer, Structured Problem Solving, Multi-Step Application
Paper 3 (Calculator)	1ชม. 30นาที	80	29	33.33%	Short Answer, Structured Problem Solving, Multi-Step Application

เกณฑ์เกรด

54321U

ข้อกำหนดเครื่องคิดเลข

A scientific or graphical calculator that meets JCQ regulations may be used (some GCSE Mathematics and Science papers are non-calculator). Graphical calculators must be set to exam mode; you must clear any stored programs, notes or data before the exam, and the calculator must not be able to retrieve stored text or formulae.

AO1: AO1: Use and apply standard techniques (50%)
AO2: AO2: Reason, interpret and communicate mathematically (25%)
AO3: AO3: Solve problems within mathematics and in other contexts (25%)

จัดทำจากข้อสอบเก่าและเกณฑ์การให้คะแนนจริง (2022–2024)

โปรแกรมเครื่องคิดเลข

Table mode for roots & turning points

Scientific calculator (e.g. Casio fx-991 series)

วัตถุประสงค์: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.

ใช้เมื่อใด: Solving or sketching a function when you want to find where its graph crosses or turns.

ขั้นตอน

Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.

ข้อควรระวังในการสอบ: Allowed under JCQ rules, but you must still show your method — an unsupported calculator answer earns no method marks. Clear all stored programs, notes and data (graphical calculators in exam mode) before the exam.

Statistics mode (mean, SD & regression)

Scientific calculator (e.g. Casio fx-991 series)

วัตถุประสงค์: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.

ใช้เมื่อใด: Any data-handling, statistics, or required-practical analysis question.

ขั้นตอน

Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.

Carry exact values with Ans & memory

Scientific calculator (e.g. Casio fx-991 series)

วัตถุประสงค์: Keep full-precision intermediate values to avoid rounding errors.

ใช้เมื่อใด: Multi-step calculations where premature rounding loses the final accuracy mark.

ขั้นตอน

Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.

Equation solver — to CHECK your working

Scientific calculator (e.g. Casio fx-991 series)

วัตถุประสงค์: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.

ใช้เมื่อใด: As a check only, after solving by hand.

ขั้นตอน

Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.

ข้อผิดพลาดที่พบบ่อย

1highคะแนนที่เกี่ยวข้อง: 1Number (Foundation tier knowledge, skills and understanding)
Failing to convert a final calculated answer back to correct standard form notation, leaving coefficients outside the valid 1 to 10 range (e.g., leaving 24 x 10^-2).
วิธีหลีกเลี่ยง: Always check that your final standard form coefficient A is between 1 and 10 (1 <= A < 10). Rewrite 24 x 10^-2 as 2.4 x 10^-1 by dividing the coefficient by 10 and adding 1 to the exponent.
2highคะแนนที่เกี่ยวข้อง: 2Ratio, proportion and rates of change (Foundation tier knowledge, skills and understanding)
Giving vague or purely verbal answers on explanation questions (such as spotting Rupa's bar chart errors or Callum's area conversions) without displaying numerical calculations or citing formal mathematical definitions.
วิธีหลีกเลี่ยง: Always show complete, step-by-step arithmetic or state the precise rule violated (e.g., 'He forgot to square the linear scale factor when converting area units') followed by a clear, concluding decision.
3mediumคะแนนที่เกี่ยวข้อง: 3Ratio, proportion and rates of change (Foundation tier knowledge, skills and understanding)
Calculating simple annual interest or decay and multiplying by the number of years instead of compounding step-by-step (e.g., over a 3-year period).
วิธีหลีกเลี่ยง: Use the exponential formula for compound growth/decay: Initial Value x (Multiplier)^n, or calculate the interest year-by-year, adding it to the principal before starting the next year.
4highคะแนนที่เกี่ยวข้อง: 2Ratio, proportion and rates of change (Foundation tier knowledge, skills and understanding)
Treating minutes as decimals directly in speed calculations (e.g., assuming 1 hour 45 minutes equals 1.45 hours).
วิธีหลีกเลี่ยง: Always convert minutes to decimal hours by dividing by 60 (e.g., 45 minutes / 60 = 0.75, so the total time is 1.75 hours) before applying speed/distance formulae.
5mediumคะแนนที่เกี่ยวข้อง: 1Geometry and measures (Foundation tier knowledge, skills and understanding)
Failing to write down precise, standard geometric terms for angle calculations, such as writing 'angles in a circle' instead of 'angles at a point add up to 360'.
วิธีหลีกเลี่ยง: Learn the exact, examiner-approved wording of core angle rules (e.g., 'angles on a straight line add up to 180' and 'angles at a point add up to 360') and write them out in full.
6mediumคะแนนที่เกี่ยวข้อง: 1Number (Foundation tier knowledge, skills and understanding)
Rounding final values too early in multi-step proportional calculations (such as travel time or mean weights), leading to minor errors in the final answer.
วิธีหลีกเลี่ยง: Keep the full, unrounded value stored in your calculator memory until you calculate the final answer, then round to the requested degree of accuracy (e.g., 3 significant figures).
7mediumคะแนนที่เกี่ยวข้อง: 2Geometry and measures (Foundation tier knowledge, skills and understanding)
Misinterpreting the area scale factor for transformations or unit conversions, such as assuming 1 m^2 equals 100 cm^2.
วิธีหลีกเลี่ยง: Remember that the area scale factor is the square of the linear scale factor. Since 1 m = 100 cm, then 1 m^2 = (100)^2 cm^2 = 10,000 cm^2.

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