Edexcel GCSE Maths Answers - Chapter 1 and Chapter 2

Sep 5, 2026

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Comprehensive answer solutions for Edexcel GCSE Maths covering key topics across Fractions, decimals and rounding, and Ratios and percentages. Includes starter and exercise answer sets by page reference, with worked results for numerical problems, calculations with recurring formats, and checks for correctness. Provides responses to review tasks and an Internet Challenge section, mixing algebraic reasoning, percentages, unit conversions, and reasoning-based questions to support exam preparation and understanding.

LanguageEnglish

CategoryExam

FormatPDF

Pages64

Reading Time2 h 41 min

AccessFree to download

Chapter 1: Fractions, decimals and rounding

Starter 1 (page 1)

Exercise 1.1 (page 6)

Exercise 1.2 (page 9)

Exercise 1.3 (page 11)

Exercise 1.4 (page 14)

Exercise 1.5 (page 16)

Exercise 1.6 (page 18)

Review Exercise 1 (page 18)

Internet Challenge 1 (page 23)

Chapter 2: Ratios and percentages

Starter 2 (page 24)

Exercise 2.1 (page 26)

Exercise 2.2 (page 29)

Exercise 2.3 (page 30)

Exercise 2.4 (page 32)

Exercise 2.5 (page 34)

Review Exercise 2 (page 34)

Internet Challenge 2 (page 37)

Answers Chapter 1: Fractions, decimals and rounding Starter 1 (page 1) 1 100 cm (1 metre) 1 2 }8} 4 One person cuts and the other one chooses. Exercise 1.1 (page 6) 1 1}4} 2 3}7} 3 4}4}1 4 1}4} 5 1}5} 6 3}4} 7 3}5} 8 3}5} 9 4}7} 10 3}5} 11 7}1}3 12 7}9} 13 1}2}, 1}21}0, 3}5}, 5}8} 14 2}3}, 3}4}, 5}6}, 7}8} 15 2}3}, 4}5}, 5}6}, 1}13}5 16 7}9} 17 9}1}6 18 5}6} 13 3 19 }}24 20 }8} 21 TK 37 155 13 22 }}48 23 }}252 24 5}4}0 67 15 5 25 10}}72 26 2}}56 27 3}8} 3 3 1 28 2}5} 29 2}4} 30 8}2} 3 31 3}2}0 Exercise 1.2 (page 9) 2 5 11 1 }5} 2 }9} 3 }2}0 4 1 4 }9} 5 15 6 }1}5 5 8 7 }}28 8 120 9 }1}5 1 15 1 10 }2} 11 }}16 12 }1}8 13 7}1}6 14 1}1}8 15 3}4} 5 16 1 17 }}16 18 2 19 9}1}6 20 11}2} 21 TK 22 205}8} 23 6 24 311}2} 25 12 26 100 27 1}2} Exercise 1.3 (page 11) 1 6}2}5 2 1}28}5 3 3}1}0 4 5}8} 5 9}101}0 6 1}4}0 7 14}57}0 8 1}59}0 9 21}8} 303 7 29 10 }}1000 11 }9} 12 }9}9 1 1733 43 13 1}3} 14 }}3330 15 }9}9 6 107 113 16 }}11 17 }}333 18 1}33}0 . ~ . 19 0.625 20 0.4 28 571 21 0. 4 22 0.45 23 0.28 24 Wrong. 0. 3. 5. 3 2 5 0.707 070…which is not 0. 7. Exercise 1.4 (page 14) 1 3.142 2 3.1416 3 16.2 4 0.24 5 14.1 6 14.8 7 6.2240 8 1.90 9 15.4 10 20 11 14.3 12 359 300 13 370 14 10 15 0.0021 16 11.0 17 a) 1000 b) 1000 c) 20 d) 6 e) 8 f) 20 g) 4 h) 5 i) 6 18 $10 800 or $12 000 19 34.5 cm 20 21 500 mm2 21 Not possible, last week must be at least 24 500, the week before not more than 24 450, so no overlap is possible. 22 No. The age is only given to the nearest million years so Charlie’s calculation is not valid. Exercise 1.5 (page 16) 1 24.058 2 24.01 3 5.089 204 26; 5.09 4 11 5 0.292 279 412; 0.292 6 4.929 503 018; 4.93 7 2.342 857 143; 2.34 8 1.161 290 323; 1.16 9 17.576 10 5.88 11 4.301 162 634; 4.30 12 1.16 13 2.150 326 797; 2.15 14 5.816 356 248; 5.82 15 1.666 666 667; 1.67 Exercise 1.6 (page 18) 1 a) 50 cm, 46 cm b) 156.25 cm2, 132.25 cm2 2 a) 34 cm b) 52.25 cm2 3 a) 29.25 cm2 b) 0.538 4 a) 60 mph b) 56.86 mph c) 63.27 mph 5 28.5 cm2 Review Exercise 1 (page 18) 1 1}23}0 2 14}1}5 3 31}21}4 4 41}21}0 5 5 6 231}3} 3 7 5 3 5 7 3}4} 8 14 9 }}12, }8}, }4}, }6} 10 3}5 , 2}3}, ~~ ~~170~~ ~~ , ~~ ~~1115 11 a) 300 b) 100 c) 8 12 5}8}, 0.65, 0.6. , 3}4} 13 a) 7}8} b) 5}1}1 14 a) 0.067, 0.56, 0.6, 0.605, 0.65 b) 210, 26, 24, 2, 5 c) 2}5}, 1}2}, 2}3}, 3}4} 5 1 15 }}12 16 }5} Answers 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 For example, 1}3} and 3}8} 855.4 kg a) 3}41}0 b) 21}11}2 a) 69.3 b) 6.93 c) 0.0693 a) 100.5 mm b) 101.5 mm a) 119.31 b) 119 310 c) 1.23 2}99}9 41.2 a) 46.416 376 42 b) 46 a) 0.787 965 007 b) 0.79 a) 17.9867 b) (1.6 + 3.8 × 2.4) × 4.2 2.56 a) 1}93}9 254 b) }49}5 4 a) }1}1 3 b) 2}2}2 21}1}5 3 a) }1}1 . b) Let X 5 0.0x. So X 5 0.0x0x0x… 100 X 5 x.0x0x0x Subtracting gives: 99X 5 x x SoX 5 }} 99 33 1.865 34 18 35 0.0205 Internet Challenge 1 (page 23) 1 1}6} 2 1}21}0 3 1}4} 1 1}1}2 4 1}2} 1 1}3} 1 1}1}2 5 1}2} 1 1}6} 1 1}9} 6 No, but the Erdos–Strauss conjecture claims that fractions ofthe form } may be written as the sum of three Egyptian fractions. The conjecture has been checked for every individual case up to n 5 1014. 7 Emily will write 5}8} as 1}2} 1 1}8} . For each of the first four sacks, divide the contents of the sack into two equal piles, giving eight piles of 1}2} a sack each. For the fifth sack, divide its contents into eight equal piles, giving 1}8} of a sack each. Give each chicken coop one of the 1}2} sack piles and one of the 1}8} sack piles. The idea is that it is easier to judge splitting a sack into equal piles (1}2} or 1}8}) than to divide it asymmetrically into 3}8} and 5}8} . Chapter 2: Ratios and percentages Starter 2 (page 24) 288 Exercise 2.1 (page 26) 1 2 : 5 2 2 : 3 3 7 : 11 4 3 : 13 5 4 : 5 : 7 6 3 : 4 : 6 7 3 : 4 : 7 8 2 : 5 9 5 : 7 : 8 10 £15, £20

FAQs

What topics are covered in these answer materials?

The answers cover Chapter 1: Fractions, decimals and rounding, and Chapter 2: Ratios and percentages.

Are the answers organized by specific exercises and pages?

Yes. Each exercise is labeled with a page reference (e.g., Exercise 1.1 (page 6), Exercise 1.2 (page 9), etc.).

Is there an Internet Challenge section included?

Yes. The document includes Internet Challenge 1 (page 23) and Internet Challenge 2 (page 37) with responses.

Sep 5, 2026

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